Cisco Cisco IOS Software Release 12.0(22)S
MPLS VPN—Carrier Supporting Carrier—IPv4 BGP Label Distribution
Configuration Examples
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Cisco IOS Release 12.0(22)S
Verifying the CE2 Router Configuration
Step 1
Verify that the loopback address of the remote CE router (CE1), learned from the PE router, is in the
routing table of the CE2 router.
routing table of the CE2 router.
Router# show ip route aa.aa.aa.aa
Routing entry for aa.aa.aa.aa/32
Known via "bgp 300", distance 20, metric 0
Tag 200, type external
Redistributing via ospf 300
Advertised by ospf 300 subnets
Last update from tt.0.0.1 22:16:46 ago
Routing Descriptor Blocks:
* tt.0.0.1, from tt.0.0.1, 22:16:46 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Configuration Examples
This section includes the following configuration examples:
•
•
Configuration of BGP/MPLS Backbone Carrier Using BGP to Distribute MPLS
Labels to an MPLS VPN Service Provider
Labels to an MPLS VPN Service Provider
This section provides a example of a backbone carrier and a customer carrier who are both BGP/MPLS
VPN service providers. This configuration example shows how BGP is enabled to distribute routes and
MPLS labels between PE and CE routers.
VPN service providers. This configuration example shows how BGP is enabled to distribute routes and
MPLS labels between PE and CE routers.
shows the example configuration.
Figure 4
Network Where the Customer Carrier Is an MPLS VPN Service Provider
CE1
aa.aa
bb.bb
cc.cc
dd.dd
ee.ee
gg.gg
hh.hh
jj.jj
PE1
Customer carrier
MPLS VPN SP
Backbone carrier
MPLS VPN SP
Customer carrier
MPLS VPN SP
CSC-CE1
CSC-PE1
CSC-PE2
IPv4 +
labels
IPv4 + labels
with multipath
support
with multipath
support
CSC-CE2
PE2
CE2
MP-IBGP exchanging VPNv4 prefixes
MP-IBGP exchanging VPNv4 prefixes
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