Configuring L3Vpn Over Gre; Creating A Gre Tunnel Between Provider Edge Routers - Cisco CRS Configuration Manual

Configuring L3VPN over GRE

Example:
RP/0/RP0/CPU0:router# show cef vrf vrf_A 10.0.0.1 location 0/1/cpu0
Displays the IPv4 CEF table for a specified VRF and location.
Step 19 show bgp vrf vrf-name ip-address
Example:
RP/0/RP0/CPU0:router# show bgp vrf vrf_A 10.0.0.0
Displays entries in the BGP routing table for VRF vrf_A.
Step 20 show ospf vrf vrf-name database
Example:
RP/0/RP0/CPU0:router# show ospf vrf vrf_A database
Displays lists of information related to the OSPF database for a specified VRF.
Configuring L3VPN over GRE
Perform the following tasks to configure L3VPN over GRE:

Creating a GRE Tunnel between Provider Edge Routers

Perform this task to configure a GRE tunnel between provider edge routers.
SUMMARY STEPS
1. configure
2. interface tunnel-ip number
3. ipv4 address ipv4-address subnet-mask
4. ipv6 address ipv6-prefix/prefix-length
5. tunnel mode gre ipv4
6. tunnel source type path-id
7. tunnel destination ip-address
8. Use the commit or end command.
DETAILED STEPS
Step 1 configure
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
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Implementing MPLS Layer 3 VPNs