02-10-2010 06:20 AM - edited 03-04-2019 07:27 AM
Hi all,
does anyone know if in case a route-map, already applied, need to be modified some more actions are needed?
In other words: if I add a clause to an already existing and running route-map, it is immediatly apllied and installed in TCAM or do I need to remove and reapply the global route-map to the interface? Does it generate interruption on the current flows?
We are running IOS 12.2(18)SXE5 on Catalyst 6509
Thanks a lot
02-10-2010 09:02 AM
A PBR action is not installed in the TCAM, the match ACL is.
For TCAM behavior on ACL changes, please refer to this documentation:
http://www.cisco.com/en/US/products/hw/switches/ps708/products_white_paper09186a00800c9470.shtml
02-25-2010 07:55 AM
Thanks a lot for the feedback, the doc is really interesting.
In the meanwhile I modified the existing route-map by adding a clause where, on ACL matching, the next-hop is modified.
I verified what happened by the use of command 'sh tcam interface vlanXXX acl in ip' where vlanXXX is the vlan on which route-map is applied. Just in case of interest for others:
- if the next hop to be set is in MSFC arp table at the time of configuration, the acl appears inside TCAM preceeded by 'policy-route'
- if the next hop to be set is NOT in MSFC arp table at the time of configuration, the acl appears inside TCAM preceeded by 'punt' and as I understood it means it will be processed by software; as soon as an icmp is directed to the next hop by populating arp table, 'punt' change in 'policy-route'
No need to remove and reapply route-map to the interface in order to make the change effective.
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