nanog mailing list archives
RE: [c-nsp] Cisco ASR BGP within the box question
From: <Steven.Glogger () swisscom com>
Date: Tue, 3 Aug 2010 10:13:15 +0200
thanks oliver, will try and keep you (and the list) updated. -steven -----Original Message----- From: Oliver Boehmer (oboehmer) [mailto:oboehmer () cisco com] Sent: Tuesday, August 03, 2010 8:06 AM To: Glogger Steven, SCS-NIT-NIO-PIO-DNW-NEO; cisco-nsp () puck nether net; nanog () nanog org Subject: RE: [c-nsp] Cisco ASR BGP within the box question Steven,
just a short question (related to a quite new feature from cisco). with the new cisco ASR software (15.0(1)S - released some days ago) it
is
able to do BGP on the same box. we need this feature because we use the VASI interfaces to bring and
filter
traffic from one VRF to another VRF and performing firewalling (ZBF). basically we have on the box: [VRF_A via vasileft1]--[VRF_B via vasiright1] and the box itself speaks BGP on VRF_B with some RR's: [ASRBox] ---- (RR) ---- [anotherbox] the fun part is, if you want to announce (e.g. 0.0.0.0/0) from VRF_B (announced from anotherbox) to VRF_A it should be possible now with
that new
feature. according to BGP I need to configure the VRF_A peer as
route-reflector-
client so the routes from the anotherbox get reflected via RR to
VRF_B.
but, it seems that the router itself needs to be tricked, since he
thinks
that both peers are in the same route-reflector cluster ("DENIED due
to:
reflected from the same cluster"): [...] so, does anyone knows a nice hidden command to disable this
cluster-checking
on a per-peer basis or so?
I'm not aware of an enhancement to set the cluster-id on a per-vrf basis, it is currently global.. But you could turn this into an eBGP session using local-as, for example router bgp 65501 address-family ipv4 vrf IABIP- neighbor 10.0.0.2 remote-as 65502 neighbor 10.0.0.2 local-as 65503 no-prepend replace-as address-family ipv4 vrf IACYP- neighbor 10.0.0.1 remote-as 65503 neighbor 10.0.0.1 local-as 65502 no-prepend replace-as not sure if this helps.. oli
Current thread:
- Cisco ASR BGP within the box question Steven.Glogger (Aug 02)
- Re: Cisco ASR BGP within the box question Joe Maimon (Aug 02)
- Message not available
- RE: [c-nsp] Cisco ASR BGP within the box question Steven.Glogger (Aug 03)