1 .. ~0··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip interface detail
`
`/3500
`9000
`9400
`
`3900
`9300
`
`Displays detailed information about the specified interfaces or all
`interfaces.
`
`Valid Minimum Abbreviation
`ip i det
`
`Important Consideration
`• When you enter the command, you are prompted for an interface
`inde.x number even if you have only one interface defined.
`
`Options
`
`Prompt
`Interface index
`
`[Default]
`
`Possible Values
`Description
`Index nurnber of the a One or more
`IP interface l.ivhose
`configured indexes
`summary
`11 all
`information you
`want to display
`
`11 7 (for a list of
`selectable indexes)
`
`Fields in the IP Interface Detail Display
`
`Field
`ARP proxy
`
`Broadcast address
`
`Directed broadcast
`
`!CMP redirect
`
`ICMP muter discovery
`
`Index
`
`!P address
`
`Description
`Whether ARP proxy is enabled or disabled for the
`specified interface.
`
`Broadcast address for the specified interface.
`
`Whether the forwarding of a directed broadcast (all 1 s
`in the host portion of the address) is enabled or
`disabled for the specified interface. (A directed
`broadcast is a packet that is sent to a specific network
`or series of networks.)
`
`Whether ICMP redirect is enabled or disabled for the
`specified interface.
`Whether the ICMP Router Discovery is enabled or
`disabled for the ::,pecified interface
`
`Index number that is associated 'vvith the interface.
`
`IP address of the interface, chosen from the range of
`addresses that the centra! agency assigned to your
`organization. This address is specific to your network
`and system.
`
`ANI-ITC-944 945-1825089
`
`

`
`Field
`
`Preference
`
`State
`
`Subnet mask
`
`Type
`
`Index
`
`MaxAdvlnterval
`
`MinAdvlnterva!
`
`Holdtime
`
`State
`
`ID
`
`ip interfaru detail --~~- •• 1
`
`Description
`
`Whether there is a preference being used for the
`specified interface. If ICMP router discovery is enabled,
`the system uses the routing interface with the highest
`preference leveL
`
`State of the IP interface. It indicates vvhether the
`interface is available for communications (up) or
`unavailable (down).
`
`32-bit number that uses the same format and
`representation as an IP address_ The subnet rnask
`determines ·which bits in the IP address are interpreted
`as the network number, the subnetwork number, and
`the host number. Each IP address bit that corresponds
`to a 1 in the subnet mask is in the network/subnetwork
`part of the address. Each IP address bit that corresponds
`to a 0 is in the host part of the IP address.
`Type of interface: VLAN-based (VLAN) or router
`port-based (portL
`Index number of the IP VLAN that is associated with the
`I P interface.
`
`Maximum advertisement interval between ICMP router
`discovery advertisernents (in seconds).
`
`Minimum advertisement interval between IC MP router
`discovery advertisements (in seconds).
`
`Length of time that ICMP router discovery
`advertisements are held valid.
`
`State of the IP interface. It indicates whether the
`interiace is available for communications (up) or
`unavailable (down).
`
`a Logical port number of the IP interface (if the Type
`f1eld displays port)
`
`a VLAN index number that is associated with the IP
`interface (if the Type field displays VLAN)
`
`ANI-ITC-944 945-1825090
`
`

`
`1 .. ~2··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`IP Interface Detail Example (3500)
`
`Select menu opt.ion (ip/interface) : detail
`Select IP interfaces (llal1l?l
`] : 1
`IP routing is disabled
`
`IP add.ress
`Index
`1 158.101.31.21
`
`Subnet mask
`255~255~255,.0
`
`St.ate Type
`Port
`Down
`
`ID
`1
`
`Index
`1
`
`ARP proxy
`enabled
`
`Broadcast address
`255.255.255.255
`
`Directed broadcast
`enabled
`
`ICMP redirect
`enabled
`
`ICMP router discovery
`Index
`1 disabled
`
`Preference Ma;.:-..Advinterval Nin..'\dvinterYal Holdtime
`n/a
`n/a
`n/a
`n./a
`
`ANI-ITC-944 945-1825091
`
`

`
`ip interface define
`(3500/9000 Layer 3)
`
`.; 3500
`.; 9000
`9400
`
`3900
`9300
`
`ip Interface define (350019000 Layer 3) --~~- •• 1
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`Defines an IP interface .
`
`Valid Minimum Abbreviation
`ip i def
`
`Important Considerations
`11 When you define an IP interface, you rnust decide whether you want
`the interface to use router port-based routing or VLAN-based routing.
`
`• Router port-based routing directs the system to attempt to route
`the frame before it attempts to bridge the frame_
`
`When you set up a router port-based IP interface, the system
`automatically creates a virtual LAN (VLAN) for the interface. The
`system assigns the next available VLAN index number to this VLAN.
`
`• VLAN-based routing directs the system to attempt to bridge the
`frame before it attempts to route the frame.
`
`When you set up a VLAN-based IP interface, you must first define a
`VLAN and select IP as a protocol supported by the VLAN, as
`described in Chapter 14.
`
`If you define a router port, you do not have to define the VLAN first; the
`corresponding single-port VLAN is automatically defined.
`
`11 Port-based routing uses aiiCiosed mode; VlAN-based routing uses
`either aiiCiosed or a!IOpen mode_ If you attempt to set up a router
`port-based IP interface in ai!Open mode, the system notifies you with
`a message that it will change the VLAN mode to a!!C!osed and
`recreate the default VLAN, clearing your existing VLANs in the process.
`Then the system prompts you to continue. (See the port-based router
`example at the end of this command description_)
`
`11 You cannot define a port-based IP interface on a port that is already a
`member of a VLAN-based IP interface. To change from one type of
`interface to another, you must redefine all !P interfaces and VLANs
`that are associated with that port.
`
`CAUTION: Using different routing models {port-based or VLAN-based) in
`the same network without careful planning can adversely affect your
`network operations. Be sure that you understand the potential effects of
`router port-based and VLAN-based routing on your network. See the
`Implementation Guide for the CoreBuilder 3500 and for the
`CoreBuilder 9000 for detailed information about !P interfaces and VLANs.
`
`ANI-ITC-944 945-1825092
`
`

`
`1 .. ~... CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`Options
`
`Prompt
`!P address
`
`Subnet mask
`
`Description
`IP address of the interface, chosen
`from the range of addresses that
`the central agency assigned to your
`organization. This address is specific
`to your network and sysi:em.
`
`[Default]
`Possible Values
`A valid IP address -
`in the range of
`addresses that
`are assigned to
`your
`organization
`
`Depends
`on
`specified IP
`address
`
`32-bit number that uses the same A valid subnet
`format and representation as an IP
`mask in
`address. The subnet mask
`accordance with
`determines \Vhkh bits in the IP
`the bits that are
`used for network
`address are interpreted as the
`network number, the subnetwork
`number,
`number, and the host number.
`subnetwork, and
`Each IP address bit that corresponds
`host nurn ber
`to a 1 in the subnet mask is in the
`network/subnetwork part of the
`address. Each IP address bit that
`corresponds to a 0 is in the host
`part of the IP address.
`
`Interface type Whether to use router port-based
`routing or VlAN-based routing.
`
`11 port
`
`vlan
`
`VLAN mode
`(for router
`port-based
`routing)
`
`Bridge port (for
`router
`port-based
`routing)
`
`VLAI\J interface
`index (for
`VLAI\J-based
`routing)
`
`Whether the syo.i:ern removes all
`VLANs and recreates the default
`VLAN to enable port-based routing. • Y (yes)
`
`• vlan
`• n (no)
`
`y
`
`Port to use for port -based routing
`(may designate only one port).
`
`Index number of the IP VLAN that is
`associated with the IP interface; for
`a VLAN-based IP interface, you
`must assign this number. (Not
`applicable if you have more than
`one VLAN)
`
`•
`
`•
`
`11
`
`•
`
`1 - n
`? (for a list of
`selectable
`ports)
`
`A selectable
`VlAN index
`
`Next
`available
`index
`? (for a list of number
`selectable
`VlAN
`indexes)
`
`ANI-ITC-944 945-1825093
`
`

`
`ip Interface define (350019000 Layer 3) --~~- •• 1
`
`IP Interface Define Example (Port-based Routing)
`
`Enter IP address: 158.101.1.1
`Enter subnet mask [255.255.0.0]: 255.255.255.0
`Enter interface type (vlan/port) [vlan] : port
`VLAN mode must. be changed to allClo.sed to support this
`interface.
`This removes all VL.ANs, then re-creates the Default VLAN.
`continue? (n,y) [y]: y
`Select bridge port (1-6l?l: 1
`
`IP Interface Define Example (VlAN-based Routing)
`
`Ent.er IP address: 158.101.1.1
`Ent.er sub:net mask [255.255.0.0]: 255.255.255.0
`Ent.er interface type (vlan/port} [vlan] :vlan
`E.nt.er VLAN interface index {3 I?} [3] : 3
`
`ANI-ITC-944 945-1825094
`
`

`
`1 .. ~6··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip interface define O.efines an IP interface.
`(3900/9300/9400/
`9000 layer 2) Valid Minimum Abbreviation
`ip i def
`
`3500
`.; 9000
`.; 9400
`
`.; 3900
`.; 9300
`
`Important Consideration
`• Before you define the IP (routing) interface, first define a virtual LAN
`(VLAN) and select IP as a protocol that the VLAN supports, as
`described in Chapter 16 .
`
`Options
`
`Prompt
`!P address
`
`Subnet mask
`
`\/LAN interface
`index
`
`Description
`!P address of the interface,
`chosen from the range of
`addresses that the central agency
`assigned to your organization.
`This address is :specific to your
`network and system.
`
`32-bit nurnber that uses the
`same format and representation
`as an IP address. The subnet
`mask determines which bits in
`the !P address are interpreted a:s
`the network number, the
`subnetwork number, and the
`host numbeL Each IP address bit
`that corresponds to a 1 in the
`subnet mask is in the
`network/subnetwork part of the
`address. Each IP address bit that
`corresponds to a 0 is in the host
`part of the IP address.
`
`Index number of the IP VLAN
`that is associated with the IP
`interface.
`(Not applicable if you have more
`than one VLAN)
`
`[Default]
`
`-
`
`Depends on
`specified IP
`address
`
`Possible Values
`A valid IP address
`in the range of
`addresses that
`are assigned to
`your
`organization
`
`A valid subnet
`mask in
`accordance with
`the bits that are
`used for net\vork
`number,
`subnetwork, and
`host number
`
`• A selectable
`VlAN index
`
`Current
`value
`
`•
`
`? (for a list of
`selectable
`VLAN
`indexes)
`
`IP Interface Define Example
`Enter IP address: 158.101.1.1
`Enter subnet mask [255.255.0.0]: 255.255.255.0
`Enter VLAN interface index {2j?} [2] :2
`
`ANI-ITC-944 945-1825095
`
`

`
`ip interface modifY --~~-.. 1
`
`ip interface modify
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`Changes the configuration of an interface that you have already defined.
`
`Valid Minimum Abbreviation
`ip i m
`
`Important Consideration
`• On the CoreBui!der 3500, you cannot modify the port number (router
`port-based routing) after it has been defined because of the
`associated virtual LAN (VLAN); you must remove the interface and
`then redefine it.
`
`Options
`
`Prompt
`
`Description
`
`IP interface
`
`IP address
`
`Index number that is associated
`with the interface that you want
`to modify.
`(Not applicable if you have more
`than one interface)
`IP address of the interface that
`you want to modify.
`
`Subnet mask
`
`Subnet mask for the interface
`that you want to modify.
`
`Possible Values
`
`[Default}
`
`• A selectable IP
`interface index
`
`Current
`value
`
`•
`
`? (tor a hst of
`selectable
`indexes)
`
`A valid IP address
`in the range of
`addresses that are
`assigned to your
`organization
`
`A valid subnet
`mask in
`accordance with
`the bits that are
`used for network
`number,
`subnetwork, and
`host number
`
`Current IP
`address
`
`Current
`sub net
`mask
`
`VLAN interface
`index (for
`VLAN-based
`routing)
`
`Index number of the IP VLAN
`that is associated with the IP
`interface; for a VLAN-based IP
`interface, you rnust assign this
`number.
`(Not applicable if you have more
`than one VLAN)
`
`• A selectable
`VLAN index
`
`Current
`value
`
`• 7 (for a l1st of
`selectable
`VLAN indexes)
`
`ANI-ITC-944 945-1825096
`
`

`
`1 .. ~8··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip interface remove
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Removes an IP interface from the system's routing table.
`
`Valid Minimum Abbreviation
`
`ip i re
`
`Important Considerations
`1111 Before you remove the interface, remove any static entries in the
`routing table or the Address Resolution Protocol (ARP) cache.
`
`1111 On the CoreBuilder 3500, if you remove a router port-based IP
`interface, the system removes the virtual LAN {VLAN) that is associated
`with it as welL
`
`Options
`
`Prompt
`! P interfaces
`
`Description
`Index number that is associated
`with the interfaces that you want
`to remove
`(Not applicable if you have more
`than one interface)
`
`[Default]
`Current
`value
`
`Possible Values
`• One or more
`selectable
`interface
`indexes
`• all
`• 7 (for a list of
`selectable
`interface
`indexes)
`
`ANI-ITC-944 945-1825097
`
`

`
`ip interface arpProxy
`
`/3500
`/9000
`9400
`
`3900
`9300
`
`ip interface arpProxy --~~ •• 1
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`On a per-interface basis, enables or disables ARP proxy, which helps end
`stations on a subnetwork reach remote subnetworks that do not have
`routing capabilities or a default gateway configured.
`
`Valid Minimum Abbreviation
`ip i a
`
`Important Considerations
`11 When ARP proxy is enabled and an end station sends an Address
`Resolution Protocol (ARP) request for a remote network, the system
`determines if it has the best route and then answers the ARP request
`by sending its own MAC address to the end station. The end station
`then sends the frames for the remote destination to the system, which
`uses its own routing table to reach the destination on the other
`network.
`11 When an interface is defined, the default ARP proxy state is enabled.
`11 The end stations must view the entire network configuration as one
`network {that is, by using a smaller subnet mask).
`11 Evaluate prolonged use of ARP proxy because it has some drawbacks,
`including increased ARP traffic and a need for larger ARP tables to
`handle the mapping of IP addresses to MAC addresses.
`
`Options
`
`Prompt
`
`Interface
`
`Description
`
`Index number for the interface
`for which you want to enable or
`disable ARP proxy.
`(Not applicable if you have more
`than one inte1iace)
`
`ARP proxy
`state
`
`Whether you want to irnplernent
`ARP proxy on an interface. The
`system1 prompts you for a state
`for each interface.
`
`Possible Values
`
`11 One or more
`selectable
`interface
`indexes
`11 all
`• 7 (for a !1st of
`selectable
`interface
`indexes)
`
`11 enabled
`disabled
`
`11
`
`[Default)
`Current
`value
`
`Current
`value
`
`ANI-ITC-944 945-1825098
`
`

`
`1--~~-0··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`IP Interface ARP Proxy Example (3500)
`Select menu option (ip/interface}: arpproxy
`Select IP interfaces (1,2l?lall) :2
`Interface 2 - Enter proxy state (disabled, enabled)
`[enabled] : enabled
`
`ANI-ITC-944 945-1825099
`
`

`
`ip interface
`broadcastAddress
`
`.; 3500
`.; 9000
`9400
`
`3900
`9300
`
`ip interface broadcastAddress --~~-~- •• 1
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`On a per-interface basis, assigns the broadcast address that the system
`uses to forward the received directed broadcasts and advertise Routing
`Information Protocol (RIP) packets .
`
`Valid Minimum Abbreviation
`ip i b
`
`Important Considerations
`11 You assign the broadcast address on a per:..interface basis.
`
`11 When an IP interface is confiqured, its default broadcast address is
`255.255.255.255.
`
`11 The broadcast address that you specify affects the RIP advertisement
`address that is used for the RIP interface. You see the specified
`broadcast address as the advertisement address under the RIP menus.
`See "ip rip display" later in this chapter for information about the RIP
`interface display.
`
`11 You cannot change the broadcast address for an interface if you have
`added any RIP advertisement addresses to that interface. See "ip rip
`addAdvertisernent" later in this chapter for more information.
`
`Options
`
`Prompt
`
`Description
`
`IP interfaces
`
`Index number of the
`interfaces to which you
`want to assign a broadcast
`address
`
`(Not applicable if you have
`more than one interface)
`
`[Default]
`Possible Values
`11 One or more Current value
`interface
`indexes
`
`• all
`
`11 7 (for a list of
`selectable
`interface
`indexes)
`
`Broadcast
`address per
`interface
`
`Broadcast address that
`you want to assign to an
`interface
`
`A valid address
`
`Current address
`
`ANI-ITC-944 945-1825100
`
`

`
`1--~~·2··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip interface
`directed Broadcast
`
`.; 3500
`.; 9000
`9400
`
`3900
`9300
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Specifies whether the forwarding of a directed broadcast (all 1 s in the
`host portion of the address) is enabled or disabled for a specified
`interface. A directed broadcast is a packet that is sent to a specific
`network or series of networks.
`
`Valid Minimum Abbreviation
`ip i di
`
`Important Considerations
`11 You define the directed broadcast state on a per-interface basis.
`
`11 When the state is enabled and the system determines that the
`destination is different from the interface that is receiving the directed
`broadcast, the system uses the broadcast address that is defined for
`this interface to forward the directed broadcast
`11 You can disable the forwarding of a directed broadcast if security is an
`ISSUe.
`
`11 By default, the directed broadcast state is enabled.
`
`Options
`
`Prompt
`! P interfaces
`
`Description
`
`Possible Values
`
`[Default]
`
`Index numbers of the interfaces
`to which you want to enable or
`disable the forwarding of a
`directed broadcast
`
`• One or more
`selectable
`interface
`indexes
`
`Current
`value
`
`(Not applicable if you have more
`than one interface)
`
`• all
`
`• ? (for a list of
`selectable
`interface
`indexes)
`
`Directed
`Whether you \Vant to implement • enabled
`broadcast state direct broadcast on an interface.
`• disabled
`The system prompts you for a
`state for each interface.
`
`Current
`value
`
`IP Interface Directed Broadcast Example (3500)
`
`Select menu option (ip/interface}: directed.Broadcast
`Select IP interfaces (1,2lalll?l :2
`Interface 2 ~ Enter directed broadcast state
`(disabled, enabled)
`[enabled] :
`
`ANI-ITC-944 945-1825101
`
`

`
`.; 3500
`.; 9000
`9400
`
`3900
`9300
`
`ip interface icmpRediroct --~~-~- •• 1
`
`ip interface
`icm pRedirect
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`Enables or disables the transmission of an Internet Control Message
`Protocol (ICMP) redirect to the sender of a frame to indicate that there is
`a better gateway available to handle the frame than this routing
`interface.
`
`Valid Minimum Abbreviation
`ip i
`icmpre
`
`Important Considerations
`11 The software determines whether there is a better path for the frame
`by determining whether the source interface is the same as the
`destination interface and whether the frame's sender is on a directly
`connected network. If the softvvare determines that a received frame
`has a better path available through another gateway:
`
`•
`
`It sends an ICMP redirect message back to the originator of the
`frame indicating the better gateway to use in the future
`
`•
`
`It routes the frame to the gateway
`
`11
`
`ICMP redirect can be set on a per-interface basis.
`
`11 For better performance or if you have applications that ignore ICMP
`redirects, disable the ability of the interface to send ICMP redirects.
`
`11
`
`If you have two interfaces that belong to virtual LANs (VLANs) that
`share a given port and you want to completely disable ICMP redirects
`for that port, disable the redirects for each interface that shares that
`port If you disable it for only one interface and enable it for the other,
`you may not get the performance improvement that you want
`
`ANI-ITC-944 945-1825102
`
`

`
`1--~~·4··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`Options
`
`Prompt
`! P interfaces
`
`!CMP redirect
`state
`
`Description
`Index number of the interfaces
`to which you want to enable or
`disable the transmission of an
`IC MP redirect to the sender of
`a frame.
`(Not applicable if you have
`more than one interface)
`
`Whether you want to
`implement ICMP redirect state
`on an interface. The system
`prompts you for a state for
`each interface.
`
`Possible Values
`a One or more
`selectable
`interface indexes
`
`[Default}
`
`Current
`value
`
`a all
`
`•
`
`? {for a list of
`selectable
`interface indexes)
`
`a enabled
`
`a disabled
`
`disabled, or
`current
`value
`
`ANI-ITC-944 945-1825103
`
`

`
`ip interface
`icmpRouterDiscovery
`
`.; 3500
`.; 9000
`9400
`
`3900
`9300
`
`ip interface icmpRouterDiscovery --~~-~- •• 1
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`Enables or disables Internet Control Message Protocol (ICMP) router
`discovery, which enables hosts that are attached to multicast or broadcast
`networks to discover the IP addresses of their neighboring routers and
`determine which router to use for a default gateway.
`
`Valid Minimum Abbreviation
`ip i
`icmpro
`
`Important Considerations
`IC MP router discovery can be set on a per-interface basis.
`
`11
`
`11 When you enable the state for an interface, the system prompts you
`for a preference. (See RFC 1256.) By default, this preference level is o.
`Use the preference to control the use of certain routers as the default
`router. The host uses the router with the highest preference leveL
`
`11 An appropriately configured end station can locate one or more
`routers on the LAN to which it is attached. The end station then
`automatically installs a default route to each of the routers that are
`running Internet Control Message Protocol (!CMP) router discovery.
`You do not need to manually configure a default route. ICMP redirect
`messages subsequently channel the !P traffic to the correct router.
`
`11 You can configure only certain end stations to work with the !CMP
`router discovery protocoL See the documentation for your
`workstation to determine whether you can configure it to work with
`this protocol.
`
`11 You can configure and display three timers for ICMP router discovery
`on the CoreBuilder 3500:
`
`• Maximum advertisement interval- The maximum time
`interval between advertisements.
`
`• Minimum advertisement interval- The minimum time interval
`between advertisements.
`• Advertisement holdtime- The length of time that
`advertisernents are held valid.
`
`ANI-ITC-944 945-1825104
`
`

`
`1--~~·6··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`The ranges for minimum advertisement interval depend on the set values
`for maximum advertisement interval and the holdtime range depends on
`the input values for both the maximum and minimum advertisement
`intervals.
`
`Options
`
`Prompt
`
`Description
`
`! P interfaces
`
`Index number of the interfaces
`for which you want to enable or
`disable IC MP router discovery.
`
`(Not applicable if you have more
`than one interface)
`
`Whether you >vant to implement
`ICMP router discovert on an
`interface. The system prompts
`you for a state for each interface.
`
`If you select enabled, the host
`interprets an unsigned integer as
`a 32-bit signed
`twos-complement integer that
`represents the preference level to
`assoc1ate with the interface.
`Higher values produce higher
`preference levels. The minimum
`value is resmved so that the
`address is not used as a default
`router address, only for specific
`IP destinations.
`
`Maximum interval between
`advertisements.
`
`Router
`discovery state
`
`Preference
`
`Maximum
`advertisement
`interval
`
`Minimum
`advertisement
`interval
`
`Possible Values
`• One or more
`selectable
`interface indexes
`
`[Default]
`
`Current
`value
`
`• all
`• 7 (for a list of
`selectable
`interface
`indexes)
`
`•
`
`enabled
`
`• disabled
`
`disabled,
`or current
`value
`
`minimum value
`(hex 80000000)
`-231 to 231
`
`0
`
`4 - 1 800 seconds
`
`600
`
`Minimum interval bet'vveen
`advertisements.
`
`3 - 600 seconds
`
`450
`
`Advertisement Length of time that
`holdtime
`advertisements are held valid.
`
`600- 9000 seconds 1800
`
`ANI-ITC-944 945-1825105
`
`

`
`ip interface icmpRouterDiscovery --~~-~- •• 1
`
`IP Interface KMP Router Discovery Example (3500)
`
`Select menu option Up/interface) : ic:mprouterdiscovery
`
`Select IP interfaces (lialli?) [l]: 1
`
`Interface
`Interface
`Interface
`Interface
`Interface
`
`·· Ente.r- ruuter discovery state (disabled, enabled) [disabled] : enabled
`- Enter router discovery preference [0]
`- Enter maximum advertisement interval {4-1800} [600]:
`- Enter minimum advertisement interval (3-600)
`[450]
`... Enter· advertisement holdtime (600 .. 9000)
`[1800] :
`
`ANI-ITC-944 945-1825106
`
`

`
`1--~~·8··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip interface statistics
`
`/3500
`/9000
`9400
`
`3900
`9300
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Displays IP interface statistics on a per-interface basis.
`
`Valid Minimum Abbreviation
`
`ip i st
`
`Important Consideration
`1111 The system prompts you fm an interface index number even if you
`have only one interface defined.
`
`Options
`
`Prompt
`Interface index
`
`[Default]
`
`Description
`Index number of the
`interface whose
`statistics you want to
`display
`
`Possible Values
`• One or more
`configured interface
`indexes
`
`• all
`•
`? (for a l!st of
`selectable interface
`indexes)
`
`Fields in the IP Interface Statistics Display
`
`Field
`
`Description
`
`inAddrErrors
`
`inCsumErrors
`
`in Delivers
`
`Number of datagrams that the IP station discarded because of an
`error in the source or destination IP address
`Nurnber of datagrarns that were dropped because of a checksurn
`error
`
`Number of datagrams that the IP station delivered to locaiiP client
`protocols
`
`in Discards
`
`Number of packet receive discards
`
`in forwards
`
`inHdrErrors
`
`in Receives
`
`Total number of packets that were forwarded (that is, routed
`through hard\vare or software or both)
`
`Number of datagrams that the IP station discarded because the IP
`header contained errors
`
`Total number of IP datagrams that were received, including those
`with errors
`
`inSameSegment Number of packets that were received on an interface and that
`need to be foflJVarded out on the same interface
`
`ANI-ITC-944 945-1825107
`
`

`
`ip interface statistics --~~-~ •• 1
`
`Field
`
`Description
`
`inTtiExceeds
`
`outDiscards
`
`outForwards
`
`Number of packets that were received on an interface and that
`need to be forvvarded, but that have an IP header TTL value of less
`than 2
`
`Number of packet transmit discards
`Total number of packets that a router has forwarded to an
`outbound interface (that is, routed through hardware or software
`or both)
`
`ANI-ITC-944 945-1825108
`
`

`
`1--~~0··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip route display
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Displays the system's routing table to determine which routes to other IP
`networks are configured and whether the routes are operational.
`
`Valid Minimum Abbreviation
`ip route di
`
`Important Considerations
`111 For the Core Builder 3500 only, the system prompts you for an !P
`address and subnet mask. As a result, you can display only a subset of
`routes instead of all routes. To see a!! entries in the table, simp!y press
`Enter at these prompts.
`111 The first line in the output (the status line) indicates whether IP routing
`is enabled:
`
`• For the CoreBuilder 9000 Layer 3 module, it also indicates whether
`Internet Control Message Protocol (ICMP) router discovery is
`enabled on the system.
`
`• For the CoreBuilder 3500, IP interface options (such as ICMP router
`discovery) appear under "ip interface detail" earlier in this chapter
`and are set on a per-interface basis ..
`
`Options (3500 only)
`
`Prompt
`
`!P address
`
`Subnet mask
`
`Description
`
`Possible Values
`
`[Default]
`
`• A valid IP address
`
`0.0.0.0
`
`• 0.0.0.0 (displays all
`entries)
`
`A valid subnet mask of a
`specified !P address
`
`Current
`value
`
`IP address (and its
`corresponding
`subnet mask) for
`which to display only
`those routes that
`match the bits set
`in it
`
`Subnet mask for the
`specified IP address
`for which to display
`only those routes
`that match the bits
`set in it
`
`ANI-ITC-944 945-1825109
`
`

`
`ip route display --~~- •• 1
`
`Fields in the IP Route Display
`
`Field
`
`Destination
`
`Subnet mask
`
`Metric
`
`Gateway
`
`Status
`TIL
`
`Description
`iP address of the destination network, subnetvvork, or host This
`field can also identify a default route, which the system uses to
`forward packets that do not match any otr·1er routing table entry.
`You may want to use the default route in place of routes to
`numerous destinations that all have the same gateway IP
`address.
`
`Subnet mask that is associated with the IP address of the
`destination network, subnetwork, or host.
`Associated cost of sending a packet to the destination. The
`system includes the metric in its RIP and OSPF updates to allow
`other routers to compare routing information received from
`different sources.
`
`Address that directs the router how to forvvard packets whose
`destination addresses match the route's IP address and subnet
`mask. The system forvvards such packets to the indicated
`gateway.
`Status of the route, See the following status table.
`Time To Live -Time remaining before the route expires or is
`reset
`
`Status for Routes
`
`Field
`
`Direct
`
`learned
`
`learned
`RIP-Zombie
`
`learned RIP2
`Local
`
`Static
`
`Timed out
`
`Description
`Route is for a directly connected network
`Route \Vas learned using indicated protocol
`
`Route was learned but is partially timed out. This condition is
`applied to all learned routes reached by an interface gateway
`which i::, in the down state.
`Route was learned using RIP-2 protocol
`
`Actual interface address
`
`Route was statically configured
`Route has timed out and is no longer valid
`
`ANI-ITC-944 945-1825110
`
`

`
`1--~~2··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`i p route static For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Defines a static route.
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`Valid Minimum Abbreviation
`ip route s
`
`Important Considerations
`1111 Before you can define static routes, you must define at least one IP
`interface. See "ip interface define (3500/9000 layer 3)" earlier in this
`chapter for more information.
`
`1111 For the CoreBuilder 3500, you can define up to 256 static routes.
`
`1111 For the other platforms, you can define up to 64 static routes.
`
`111 Static routes remain in the table; you must remove them before you
`can remove the corresponding interface.
`
`1111 Static routes take precedence over dynamically learned routes to the
`same destination
`
`1111 Static routes are included in periodic Routing Information Protocol
`(RIP) updates that the system sends.
`
`Options
`
`Prompt
`Destination IP
`address
`
`Description
`IP address of the
`destination network,
`subnetwork, or host
`for this route
`
`Possible Values
`A valid lP address
`
`[Default]
`
`Subnet mask
`
`Subnet mask for the A valid subnet mask
`specified IP address
`
`Based on
`specified !P
`address
`
`Gateway IP
`address
`
`IP address of the
`gateway that this
`route uses
`
`A valid muter address
`
`ANI-ITC-944 945-1825111
`
`

`
`ip route remove
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`ip route remove --~~-.. 1
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Deletes an existing route.
`
`Valid Minimum Abbreviation
`ip route r
`
`Important Consideration
`• When you enter the command, the system; deletes the route
`immediately from the routing table. You are not prompted to confirm
`the deletion.
`
`Options
`
`Prompt
`
`Description
`
`Possible Values
`
`[Default]
`
`Destination !P
`address
`
`Subnet mask
`
`A. valid IP address
`
`!P address of the
`route that you want
`to delete
`Subnet mask for the A valid subnet mask
`specified !P address
`
`Based on
`specified I P
`address
`
`ANI-ITC-944 945-1825112
`
`

`
`1--~~4··· CHAPfCR 16: llffii!NH PI<OfOCL<. (IP)
`
`ip route flush For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`Deletes all !earned routes from the routing table.
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`Valid Minimum Abbreviation
`ip route .fl
`
`Important Considerations
`1111 The system flushes all learned routes from the routing table
`immediately. You are not prompted to confirm the deletion.
`1111 Flushing the routing table does not cause the Routing Information
`Protocol (RIP) to update the routing table. You must change the metric
`to update the routing table.
`
`ANI-ITC-944 945-1825113
`
`

`
`ip route default
`
`For CoreBuilder 9000: Applies to Layer 3 switching modules only.
`
`ip route default --~~- •• 1
`
`/3500
`/9000
`/9400
`
`/3900
`/9300
`
`Adds a default route to