Thanks guys. I didn't have LDP enabled between the ASes. I just reviewed the configuration guide for Inter-as mpls vpn with vpnv4 exchange between asbrs and they don't use it either.
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_connect_asbr_ps6350_TSD_Products_Configuration_Guide_Chapter.html On Fri, Aug 7, 2009 at 3:52 AM, Francisco <[email protected]> wrote: > Did you check if you had 'mpls ip' enabled on the interface connecting to > the eBGP neighbour? > > As you know there are 3 ways for MPLS to exchange labels: > > - LDP > - BGP > - RSVP-TE > > If you've been enabling mpls on the interfaces connecting eBGP neighbours, > then they've changed labels anyway and the send-label command is redundant. > > I had the same situation with a mock lab in the INE bootcamp. I had Option > B > working but I was not giving the points because I had not use send-label, > even though everything is working (which is why you don't notice any > problems :) > > Considering how picky is the script during the exam I would advise you to > use send-label for Option B. > > For what I've heard the script sometimes checks the output of pre-determine > show commands, but as well seeks for specific entries in the configuration, > so careful there. > > All the best, > Francisco > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > Bryan Bartik > Sent: 07 August 2009 03:00 > To: [email protected]; [email protected] > Subject: Inter-AS VPN Option B and send-label > > I have seen some example of option B (ASBRs exchanging VPNv4 routes) and > send-label being used...however I have it working without it. I doubt it is > needed because the ASBR's share their own local label for VPN routes with > each other and this put in their LFIB. The FEC is actually a VPNv4 route. > > Topology: > R1-R2 are AS100 > R6,R7 are AS200 > R3 is in VRF > R1 ---- R5 ---- | ---- R6 ---- R7 ---- vrf ---- R3 > > From R6: > Local Outgoing Prefix > 604 703 200:1:3.3.3.3/32 > > From R5: > Local Outgoing Prefix > 505 604 200:1:3.3.3.3/32 > > No routers have send-label and everything works fine. Is there a reason I > see send-label used with option B? > > -- > Bryan Bartik > CCIE #23707 (R&S), CCNP > Sr. Support Engineer - IPexpert, Inc. > URL: http://www.IPexpert.com > > _____________________________________________________________________ > Subscription information: http://www.groupstudy.com/list/comserv.html > > Checked by AVG - www.avg.com > Version: 8.5.392 / Virus Database: 270.13.16/2240 - Release Date: 08/06/09 > 05:57:00 > > _____________________________________________________________________ > Subscription information: http://www.groupstudy.com/list/comserv.html > -- Bryan Bartik CCIE #23707 (R&S), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
