Cisco Nexus 7000 Series - Configuring Route Policy Manager; Configuring IP Prefix Lists

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16-6
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 16 Configuring Route Policy Manager
Configuring Route Policy Manager
• Because you can use a route map before you define it, verify that all your route maps exist when you
finish a configuration change.
• You can view the route-map usage for redistribution and filtering. Each individual routing protocol
provides a way to display these statistics.
• When you redistribute BGP to IGP, iBGP is redistributed as well. To override this behavior, you
must insert an additional deny statement into the route map.
Configuring Route Policy Manager
Route Policy Manager configuration includes the following topics:
• Configuring IP Prefix Lists, page 16-6
• Configuring AS-path Lists, page 16-8
• Configuring Community Lists, page 16-9
• Configuring Extended Community Lists, page 16-10
• Configuring Route Maps, page 16-11
Note If you are familiar with the Cisco IOS CLI, be aware that the Cisco NX-OS commands for this feature
might differ from the Cisco IOS commands that you would use.
Configuring IP Prefix Lists
IP prefix lists match the IP packet or route against a list of prefixes and prefix lengths. You can create
an IP prefix list for IPv4 and create an IPv6 prefix list for IPv6.
You can configure the prefix list entry to match the prefix length exactly, or to match any prefix with a
length that matches the configured range of prefix lengths.
Use the ge and lt keywords to create a range of possible prefix lengths. The incoming packet or route
matches the prefix list if the prefix matches and if the prefix length is greater than or equal to the ge
keyword value (if configured) and less than or equal to the lt keyword value (if configured).
SUMMARY STEPS
1. config t
2. {ip | ipv6} prefix-list name description string
3. ip prefix-list name [seq number] [{permit | deny} prefix {[eq prefix-length] | [ge prefix-length] [le
prefix-length]}]
or
ipv6 prefix-list name [seq number] [{permit | deny} prefix {[eq prefix-length] | [ge prefix-length]
[le prefix-length]}]
4. show {ip | ipv6} prefix-list name
5. copy running-config startup-config