Cisco Nexus 3000 series - Configuring Route Dampening; Configuring Load Sharing and ECMP

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6-26
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
Chapter 6 Configuring Advanced BGP
Configuring Advanced BGP
This example shows how to configure the router as a route reflector and add one neighbor as a client:
switch(config)# router bgp 65536
switch(config-router)# neighbor 192.0.2.10 remote-as 65536
switch(config-router-neighbor)# address-family ip unicast
switch(config-router-neighbor-af)# route-reflector-client
switch(config-router-neighbor-af)# copy running-config startup-config
Configuring Route Dampening
You can configure route dampening to minimize route flaps propagating through your iBGP network.
To configure route dampening, use the following command in address-family or VRF address family
configuration mode:
Configuring Load Sharing and ECMP
You can configure the maximum number of paths that BGP adds to the route table for equal-cost
multipath load balancing.
To configure the maximum number of paths, use the following command in router address-family
configuration mode:
Step 10
show bgp ip {unicast | multicast}
neighbors
Example:
switch(config-router-neighbor-af)#
show bgp ip unicast neighbors
(Optional) Displays the BGP peers.
Step 11
copy running-config startup-config
Example:
switch(config-router-neighbor-af)#
copy running-config startup-config
(Optional) Saves this configuration change.
Command or Action Purpose
Command Purpose
dampening [{ half-life reuse-limit
suppress-limit max-suppress-time
|
route-map
map-name }]
Example:
switch(config-router-af)# dampening
route-map bgpDamp
Disables capabilities negotiation. The parameter
values are as follows:
• half-life—The range is from 1 to 45.
• reuse-limit—The range is from 1 to 20000.
• suppress-limit—The range is from 1 to 20000.
• max-suppress-time—The range is from 1 to
255.
Command Purpose
maximum-paths [ibgp] maxpaths
Example:
switch(config-router-af)# maximum-paths 12
Configures the maximum number of equal-cost
paths for load sharing. The range is from 1 to 16.
The default is 8.