E Commands
This chapter describes the Cisco NX-OS unicast routing commands that begin with the letter E.
ebgp multihop
To configure the exterior Border Gateway Protocol (eBGP) time-to-live (TTL) value to support eBGP multihop, use the ebgp multihop command. To reset to default, use the no form of this command.
Syntax Description
TTL value for eBGP multihop. The range is from 2 to 255. You must manually reset the BGP sessions after using this command. |
Defaults
Command Modes
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Usage Guidelines
Use the ebgp multihop command to configure the eBGP time-to-live (TTL) value to support eBGP multihop. In some situations, an eBGP peer is not directly connected to another eBGP peer and requires multiple hops to reach the remote eBGP peer. You can configure the eBGP TTL value for a neighbor session to allow these multihop sessions.
Examples
This example shows how to configure the eBGP multihop value:
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eigrp graceful-restart
To enable graceful restart for the Enhanced Interior Gateway Routing Protocol (EIGRP), use the eigrp graceful-restart command. To reset to default, use the no form of this command.
Syntax Description
Defaults
Command Modes
Address-family configuration
Router configuration
Router VRF configuration
Command History
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Usage Guidelines
Use the eigrp graceful-restart command to allow EIGRP to remain in the data forwarding path through a process restart. This command is the same as the nsf command.
Examples
This example shows how to enable graceful restart:
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Configures timers for nonstop forwarding and graceful restart. |
eigrp log-neighbor-changes
To enable the logging of changes in Enhanced Interior Gateway Routing Protocol (EIGRP) neighbor adjacencies, use the eigrp log-neighbor-changes command. To disable the logging of changes in EIGRP neighbor adjacencies, use the no form of this command.
Syntax Description
Command Default
Command Modes
Address-family configuration
Router configuration
Router VRF configuration
Command History
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Usage Guidelines
Use the eigrp log-neighbor-changes command to log neighbor adjacency changes to monitor the stability of the routing system and to detect problems. Logging is enabled by default. To disable the logging of neighbor adjacency changes, use the no form of this command.
Examples
This example shows how to enable logging of neighbor changes for EIGRP process 209:
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eigrp log-neighbor-warnings
To enable the logging of Enhanced Interior Gateway Routing Protocol (EIGRP) neighbor warning messages, use the eigrp log-neighbor-warnings command. To disable the logging of EIGRP neighbor warning messages, use the no form of this command.
eigrp log-neighbor-warnings [ seconds ]
no eigrp log-neighbor-warnings
Syntax Description
(Optional) Time interval (in seconds) between repeated neighbor warning messages. The range of seconds is from 1 to 65535. |
Command Default
Command Modes
Address-family configuration
Router configuration
Router VRF configuration
Command History
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Usage Guidelines
Use the eigrp log-neighbor-warnings command to enable neighbor warning messages and to configure the interval between repeated neighbor warning messages.
Examples
This example shows how to log neighbor warning messages for EIGRP process 209 and to repeat the warning messages in 5-minute (300 seconds) intervals:
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eigrp router-id
To set the router ID used by the Enhanced Interior Gateway Routing Protocol (EIGRP) when communicating with its neighbors, use the eigrp router-id command. To remove the configured router ID, use the no form of this command.
Syntax Description
Command Default
EIGRP automatically selects an IP address to use as the router ID when an EIGRP process is started. The highest local IP address is selected and loopback interfaces are preferred. The router ID is not changed unless the EIGRP process is removed with the no router eigrp command or if the router ID is manually configured with the eigrp router-id command.
Command Modes
Address-family configuration
Router configuration
Router VRF configuration
Command History
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Usage Guidelines
Use the eigrp router-id command to manually configure the router ID for EIGRP. The router ID is used to identify the originating router for external routes. If an external route is received with the local router ID, the route is discarded. The router ID can be configured with any IP address with two exceptions; 0.0.0.0 and 255.255.255.255 are not legal values and cannot be entered. You should configure unique value for each router.
Examples
This example shows how to configure 172.16.1.3 as a fixed router ID:
eigrp stub
To configure a router as a stub using the Enhanced Interior Gateway Routing Protocol (EIGRP), use the eigrp stub command. To disable the EIGRP stub routing feature, use the no form of this command.
eigrp stub [ direct | leak-map map-name | receive-only | redistributed ]
no eigrp stub [ direct | leak-map map-name | receive-only | redistributed ]
Syntax Description
(Optional) Advertises redistributed routes from other protocols and autonomous systems. |
Command Default
Command Modes
Address-family configuration
Router configuration
Router VRF configuration
Command History
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Usage Guidelines
Use the eigrp stub command to configure a router as a stub where the router directs all IP traffic to a distribution router.
The direct keyword permits EIGRP stub routing to advertise connected routes. This option is enabled by default.
The receive-only keyword restricts the router from sharing any of its routes with any other router in that EIGRP autonomous system, and the receive-only keyword does not permit any other option to be specified because it prevents any type of route from being sent.
The redistributed keyword permits the EIGRP Stub Routing feature to send other routing protocols and autonomous systems. Without the configuration of this option, EIGRP will not advertise redistributed routes.
If you use any of these four keywords ( direct, leak-map, receive-only, redistributed) with the eigrp stub command, only the route types specified by the particular keyword(s) are advertised.
Usage Guidelines
This example shows how to configure the router as a receive-only neighbor:
event fib resource tcam usage
To configure an event statement for the policy, use the event fib resource tcam usage command.
Syntax Description
Defaults
Command Modes
Command History
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Usage Guidelines
By using the event fib resource tcam usage command, you can configure a policy in the Embedded Event Manager (EEM) to monitor TCAM utilization on Cisco Nexus 7000 M1 Series modules.
The event fib resource tcam usage command triggers an event each time the TCAM utilization percentage becomes a multiple of 5, in either direction.
Examples
This example shows how to configure an event statement for the policy:
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Displays information about the status of the specified event policy. |
event fib route
To configure an event statement for the policy, use the event fib route command. To remove an event statement from an Embedded Event Manager (EEM) policy, use the no form of this command.
event fib route {inconsistent | missing | failure}
no event fib route {inconsistent | missing | failure}
Syntax Description
Defaults
Command Modes
Command History
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Usage Guidelines
Examples
This example shows how to configure an event statement for the policy:
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Displays information about the status of the specified event policy. |
export vrf
To export IP prefixes to the default VRF (global routing table) from any other VRF, use the export vrf command.
export vrf default [ prefix-limit] map route-map
Syntax Description
Command Modes
Address Family Configuration (config-vrf-af)
Command History
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Examples
The following example shows how to export the route-map, BgpMap, to default VRF, and verify the configuration:
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