Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

MPLS Inter-AS VPN: IPv4+ Labels in BGP versus MPLS LDP

I'm trying to decide between two ways to advertise the PE loopbacks in an MPLS VPN Inter-AS configuration: LDP, and BGP IPv4+ (RFC 3107). I understand that BGP provides the ability to filter routers, but with the introduction of the feature "MPLS LDP Inbound Label Filtering," LDP can be filtered as well. Does this put LDP on par with BGP; what reasons might make me choose one or the other as my preferred method?

Links to feature descriptions:

MPLS LDP Inbound Label Binding Filtering

http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1829/products_feature_guide09186a00801b23a2.html

MPLS VPN—Inter-AS—IPv4 BGP Label Distribution

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/fsiasl23.htm

Thanks,

Reid Knuttila

Network Engineer

Onvoy, Inc.

1 REPLY
Cisco Employee

Re: MPLS Inter-AS VPN: IPv4+ Labels in BGP versus MPLS LDP

My prefer to use BGP (IPv4+label). The reason I don't like to use the LDP option is that you need to redistribute the loopback adresses you learn from the remote AS into your IGP for this solution to work. Remember that LDP won't allocate labels forBGP learnt routes.

Hope tis helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
326
Views
0
Helpful
1
Replies