Cisco Nexus 3000 series - Page 170

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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
Cisco NX-OS evaluates multiple peer policies for an address family using the preference value. The
lowest preference value is evaluated first. Any attributes configured for the neighbor take priority over
any attributes inherited by that neighbor from a BGP template.
Peer-policy templates can configure address family-specific attributes such as AS-path filter lists, prefix
lists, route reflection, and soft reconfiguration.
BEFORE YOU BEGIN
Ensure that you have enabled the BGP feature (see the “Enabling the BGP Feature” section on
page 5-11).
Note When editing a template, you can use the no form of a command at either the peer or template level to
explicitly override a setting in a template. You must use the default form of the command to reset that
attribute to the default state.
SUMMARY STEPS
1. configure terminal
2. router bgp autonomous-system-number
3. template peer-policy template-name
4. advertise-active-only
5. maximum-prefix number
6. exit
7. neighbor ip-address remote-as as-number
8. address-family ipv4 {multicast | unicast}
9. inherit peer-policy template-name preference
10. (Optional) show bgp peer-policy template-name
11. (Optional) copy running-config startup-config
DETAILED STEPS
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
router bgp autonomous-system-number
Example:
switch(config)# router bgp 65536
switch(config-router)#
Enables BGP and assigns the autonomous system
number to the local BGP speaker.