Packet Flow In An Mpls Vpn - Cisco 3845 - Security Bundle Router Software Manual

Chapter 34 Configuring MPLS, MPLS VPN, MPLS OAM, and EoMPLS
Command
Step 5
autonomous-system autonomous-system-number Specify the autonomous system number of the EIGRP network
Step 6
redistribute bgp autonomous-system-number
[metric bandwidth delay reliability load mtu]
[route-map map-name]
Step 7
end
Step 8
show ip eigrp vrf neighbors
Step 9
show ip eigrp vrf topology
Step 10
show ip eigrp vrf traffic
Step 11 copy running-config startup-config
Use the no router eigrp as-number global configuration command to delete the EIGRP routing session.

Packet Flow in an MPLS VPN

Figure 34-3
Figure 34-3
VPN A, site 1
OL-23400-01
is an example of packet flow between two customer sites in an MPLS VPN network.
Sample MPLS VPN Packet Flow
CE1 IP destination:
16.2.1.1
Step 1
16.1/16
PE1
Purpose
for the customer site.
Redistribute BGP into the EIGRP.
• The autonomous system number and metric of the BGP
network are configured in this step. BGP must be
redistributed into EIGRP for the CE site to accept the BGP
routes that carry the EIGRP information. A metric must also
be specified for the BGP network and is configured in this
step.
Return to privileged EXEC mode.
Display neighbors discovered by EIGRP that carry VRF
information.
Display VRF entries in the EIGRP topology table.
Display EIGRP VRF traffic statistics.
(Optional) Save your entries in the configuration file.
PE2
P2 P2
BGP
P1
Step 2 Step 2
P3
Label N
destination: PE3
Label 42
destination: CE2
IP destination:
16.2.1.1
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring MPLS VPNs
VPN-IPv4
Net RD:16.2/16
Next hop:PE3
Label 42
PE3
IP destination:
Step 3
16.2.1.1
Step 4
Label 42
destination: CE2
IP destination:
16.2.1.1
16.2/16
VPN A, site 2
CE2
34-15