Configuring Load Sharing And Ecmp; Configuring Maximum Prefixes; Configuring Dynamic Capability - Cisco Nexus 7000 Series Configuration Manual

Chapter 11 Configuring Advanced BGP
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .

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:
Command
maximum-paths [ibgp] maxpaths
Example:
switch(config-router-af)# maximum-paths 12

Configuring Maximum Prefixes

You can configure the maximum number of prefixes that BGP can receive from a BGP peer. If the
number of prefixes exceeds this value, you can optionally configure BGP to generate a warning message
or tear down the BGP session to the peer.
To configure the maximum allowed prefixes for a BGP peer, use the following command in neighbor
address-family configuration mode:
Command
maximum-prefix maximum [threshold]
[restart time | warming-only]
Example:
switch(config-router-neighbor-af)#
maximum-prefix 12

Configuring Dynamic Capability

You can configure dynamic capability for a BGP peer.
To configure dynamic capability, use the following command in neighbor configuration mode:
Command
dynamic-capability
Example:
switch(config-router-neighbor)#
dynamic-capability
OL-20002-02
Purpose
Configures the maximum number of equal-cost
paths for load sharing. The range is from 1 to 16.
The default is 1.
Purpose
Configures the maximum number of prefixes from
a peer. The parameter ranges are as follows:
This command triggers an automatic notification
and session reset for the BGP neighbor sessions if
the prefix limit is exceeded.
Purpose
Enables dynamic capability. This command
triggers an automatic notification and session reset
for the BGP neighbor sessions.
This command is disabled by default.
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
Configuring Advanced BGP
• maximum—The range is from 1 to 300000.
• Threshold—The range is from 1 to 100
percent. The default is 75 percent.
• time—The range is from 1 to 65535 minutes.
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