08-06-2007 09:38 PM
Hi all,
I need to monitor every CE which belongs to different VRF, their IP address may be overlapping. Is there any good idea to do that.
Thanks.
08-07-2007 03:28 AM
Hi,
Your task has two parts as it seems to me:
1) get IP connectivity into all VRFs
2) access all CEs
The second task requires unique IP addresses from the viewpoint of the monitoring device. This has nothing to do with VRFs per se, just a plain IPv4 unicast requirement. Two solutions are known: give unique IPv4 addresses to all CEs (loopback IPs for monitoring) or use NAT.
The first task is achieved by creating a central service VPN for monitoring. An example config:
ip vrf NMS
rd 65000:1
route-target import 65000:162
export map NMS2vrfs
ip vrf Customer1
rd 65000:101
route-target export 65000:101
route-target import 65000:101
route-target import 65000:161
export map CEloopbacks
ip vrf Customer2
rd 65000:102
route-target export 65000:102
route-target import 65000:102
route-target import 65000:161
export map CEloops2NMS
route-map CEloops2NMS permit 10
match ip address 1
set extcommunity rt 65000:162 [additive]
route-map NMS2vrfs permit 10
match ip address 2
set extcommunity rt 65000:161 [additive]
access-list 1 permit host 10.1.1.1
access-list 1 permit host 10.2.2.2
access-list 2 permit 192.0.2.0 0.0.0.255
Your IP addresses, naming, RDs and RTs might be different. In my example I assume two CEs with 10.1.1.1 and 10.2.2.2 as monitoring Loopback IPs. The export map selectively exports only those IPs into the NMS vrf. Be aware that your monitoring LAN (192.0.2.0/24 in the example) must be reachable from all CEs, which means you have to import this prefix into all VRFs. Thus an official IPv4 address range might be required to avoid address conflicts with customer IPs.
Hope this helps! Please rate all posts.
Regards, Martin
08-14-2007 07:40 AM
Hi martin,
Thanks for you reply, that's really helpful. But i was wondering if there any other way for such a scenario. Is there anyone ever use vrf lite for monitor purpose? I am not so clear how it works.
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