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This chapter explains the function and syntax of the IP enhanced IGRP commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Cisco IOS IP and IP Routing Command Reference, Release 12.1.
To restore the default behavior of automatic summarization of subnet routes into network-level routes, use the auto-summary router configuration command. To disable this function and send subprefix routing information across classful network boundaries, use the no form of this command.
auto-summarySyntax Description
This command has no arguments or keywords.
To delete entries from the neighbor table, use the clear ip eigrp neighbors EXEC command.
clear ip eigrp neighbors [ip-address | type number]
Syntax Description
ip-address (Optional) Address of the neighbor. type number (Optional) Interface type and number. Specifying these arguments removes from the neighbor table all entries learned via this interface.
To control the candidate default routing information between Interior Gateway Routing Protocol (IGRP) or Enhanced IGRP processes, use the default-information router configuration command. To suppress IGRP or Enhanced IGRP candidate information in incoming updates, use the no default-information in command. To suppress IGRP or Enhanced IGRP candidate information in outbound updates, use the no default-information out command.
default-information {in | out} {access-list-number | name}
Syntax Description
in Allows IGRP or Enhanced IGRP exterior or default routes to be received by an IGRP process. out Allows IGRP or Enhanced IGRP exterior routes to be advertised in updates. access-list-number | name Number or name of an access list. It can be a number in the range 1 to 99 or an access list name.
To set metrics for Interior Gateway Routing Protocol (IGRP) or Enhanced IGRP, use the default-metric router configuration command. To remove the metric value and restore the default state, use the no form of this command.
default-metric bandwidth delay reliability loading mtu
Syntax Description
bandwidth Minimum bandwidth of the route in kilobits per second. It can be 0 or any positive integer. delay Route delay in tens of microseconds. It can be 0 or any positive number that is a multiple of 39.1 nanoseconds. reliability Likelihood of successful packet transmission expressed as a number between 0 and 255. The value 255 means 100 percent reliability; 0 means no reliability. loading Effective bandwidth of the route expressed as a number from 0 to 255 (255 is 100 percent loading). mtu Maximum transmission unit (MTU) size of the route in bytes. It can be 0 or any positive integer.
To allow the use of two administrative distances---internal and external---that could be a better route to a node, use the distance eigrp router configuration command. To reset these values to their defaults, use the no form of this command.
distance eigrp internal-distance external-distance
Syntax Description
internal-distance Administrative distance for Enhanced IGRP internal routes. Internal routes are those that are learned from another entity within the same autonomous system. It can be a value from 1 to 255. external-distance Administrative distance for Enhanced IGRP external routes. External routes are those for which the best path is learned from a neighbor external to the autonomous system. It can be a value from 1 to 255.
To enable the logging of changes in Enhanced Interior Gateway Routing Protocol (IGRP) neighbor adjacencies, use the eigrp log-neighbor-change router configuration command. To disable the logging of changes in Enhanced IGRP neighbor adjacencies, use the no form of this command.
eigrp log-neighbor-changesSyntax Description
This command has no arguments or keywords.
To enable authentication of IP Enhanced Interior Gateway Routing Protocol (IGRP) packets, use the ip authentication key-chain eigrp interface configuration command. To disable such authentication, use the no form of this command.
ip authentication key-chain eigrp autonomous-system key-chain
Syntax Description
autonomous-system Autonomous system to which the authentication applies. key-chain Name of the authentication key chain.
Syntax Description
autonomous-system Autonomous system number. md5 Keyed MD5 authentication.
To configure the percentage of bandwidth that may be used by Enhanced Interior Gateway Routing Protocol (IGRP) on an interface, use the ip bandwidth-percent eigrp interface configuration command. To restore the default value, use the no form of this command.
ip bandwidth-percent eigrp as-number percent
Syntax Description
as-number Autonomous system number. percent Percent of bandwidth that Enhanced IGRP may use.
To configure the hello interval for the Enhanced Interior Gateway Routing Protocol (IGRP) routing process designated by an autonomous system number, use the ip hello-interval eigrp interface configuration command. To restore the default value, use the no form of this command.
ip hello-interval eigrp autonomous-system-number seconds
Syntax Description
autonomous-system-number Autonomous system number. seconds Hello interval, in seconds.
To configure the hold time for a particular Enhanced Interior Gateway Routing Protocol (IGRP) routing process designated by the autonomous system number, use the ip hold-time eigrp interface configuration command. To restore the default value, use the no form of this command.
ip hold-time eigrp autonomous-system-number seconds
Syntax Description
autonomous-system-number Autonomous system number. seconds Hold time, in seconds.
To enable Enhanced Interior Gateway Routing Protocol (IGRP) split horizon, use the ip split-horizon eigrp interface configuration command. To disable split horizon, use the no form of this command.
ip split-horizon eigrp autonomous-system-number
Syntax Description
autonomous-system-number Autonomous system number.
To configure a summary aggregate address for a specified interface, use the ip summary-address eigrp interface configuration command. To disable a configuration, use the no form of this command.
ip summary-address eigrp autonomous-system-number address mask
Syntax Description
autonomous-system-number Autonomous system number. address IP summary aggregate address to apply to an interface. mask Subnet mask.
To allow the tuning of the Interior Gateway Routing Protocol (IGRP) or Enhanced IGRP metric calculations, use the metric weights router configuration command. To reset the values to their defaults, use the no form of this command.
metric weights tos k1 k2 k3 k4 k5
Syntax Description
tos Type of service. Currently, it must always be zero. k1-k5 Constants that convert an IGRP or enhanced IGRP metric vector into a scalar quantity.
To specify a list of networks for the Enhanced Interior Gateway Routing Protocol (IGRP) routing process, use the network router configuration command. To remove an entry, use the no form of this command.
network network-number
Syntax Description
network-number IP address of the directly connected networks.
To add an offset to incoming and outgoing metrics to routes learned via Enhanced Interior Gateway Routing Protocol (IGRP), use the offset-list router configuration command. To remove an offset list, use the no form of this command.
offset-list {access-list-number | name} {in | out} offset [type number]
Syntax Description
access-list-number | name Standard access list number or name to be applied. Access list number 0 indicates all access lists. If offset is 0, no action is taken. For IGRP, the offset is added to the delay component only. in Applies the access list to incoming metrics. out Applies the access list to outgoing metrics. offset Positive offset to be applied to metrics for networks matching the access list. If the offset is 0, no action is taken. type (Optional) Interface type to which the offset-list is applied. number (Optional) Interface number to which the offset-list is applied.
To configure the Enhanced Interior Gateway Routing Protocol (IGRP) routing process, use the router eigrp global configuration command. To shut down a routing process, use the no form of this command.
router eigrp autonomous-system
Syntax Description
autonomous-system Autonomous system number that identifies the routes to the other Enhanced IGRP routers. It is also used to tag the routing information.
To set the metric value for IP Enhanced Interior Gateway Routing Protocol (IGRP) in a route map, use the set metric route-map configuration command. To return to the default metric value, use the no form of this command.
set metric bandwidth delay reliability loading mtu
Syntax Description
bandwidth Metric value or IGRP bandwidth of the route in kilobits per second. It can be in the range 0 to 4294967295. delay Route delay in tens of microseconds. It can be in the range 0 to 4294967295. reliability Likelihood of successful packet transmission expressed as a number between 0 and 255. The value 255 means 100 percent reliability; 0 means no reliability. loading Effective bandwidth of the route expressed as a number from 0 to 255 (255 is 100 percent loading). mtu Minimum maximum transmission unit (MTU) size of the route in bytes. It can be in the range 0 to 4294967295.
To display information about interfaces configured for Enhanced Interior Gateway Routing Protocol (IGRP), use the show ip eigrp interfaces EXEC command.
show ip eigrp interfaces [type number] [as-number]
Syntax Description
type (Optional) Interface type. number (Optional) Interface number. as-number (Optional) Autonomous system number.
To display the neighbors discovered by Enhanced Interior Gateway Routing Protocol (IGRP), use the show ip eigrp neighbors EXEC command.
show ip eigrp neighbors [type number]
Syntax Description
type (Optional) Interface type. number (Optional) Interface number.
To display the Enhanced Interior Gateway Routing Protocol (IGRP) topology table, use the show ip eigrp topology EXEC command.
show ip eigrp topology [autonomous-system-number | [[ip-address] mask]]
Syntax Description
autonomous-system-number (Optional) Autonomous system number. ip-address (Optional) IP address. When specified with a mask, a detailed description of the entry is provided. mask (Optional) Subnet mask.
To display the number of Enhanced Interior Gateway Routing Protocol (IGRP) packets sent and received, use the show ip eigrp traffic EXEC command.
show ip eigrp traffic [autonomous-system-number]
Syntax Description
autonomous-system-number (Optional) Autonomous system number.
Syntax Description
balanced Distributes traffic proportionately to the ratios of the metrics. min Uses routes that have minimum costs.
To control load balancing in an Enhanced Interior Gateway Routing Protocol (IGRP)-based internetwork, use the variance router configuration command. To reset the variance to the default value, use the no form of this command.
variance multiplier
Syntax Description
multiplier Metric value used for load balancing. It can be a value from 1 to 128. The default is 1, which means equal-cost load balancing.
Posted: Wed Jul 26 13:58:50 PDT 2000
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