l Run the display bgp vpnv4 { all | vpn-instance vpn-instance-name } peer [ [ ipv4-
address ] verbose ] command to check BGP VPNv4 peer information.
l Run the display bgp vpnv4 { all | vpn-instance vpn-instance-name } network command
to check the routing information advertised by BGP VPNv4.
l Run the display bgp vpnv4 { all | vpn-instance vpn-instance-name } paths [ as-regular-
expression ] command to check the AS path information of BGP VPNv4.
l Run the display bgp vpnv4 vpn-instance vpn-instance-name peer { group-name | ipv4-
address } log-info command to check the BGP peer's log information of a specified VPN
instance.
----End
3.17.3 Checking the Network Connectivity and Reachability
This section describes how to use the ping command to detect the network connectivity between
the source and the destination, and how to use the tracert command to check the devices through
which data packets are sent from the source to the destination.
Procedure
l Run the ping [ ip ] [ -a source-ip-address | -c count | -d | -f | -h ttl-value | -i interface-
type interface-number | -m time | -n | -p pattern | -q | -r | -s packetsize | -t timeout | -tos tos-
value | -v | -vpn-instance vpn-instance-name ] * host command to check the network
connectivity.
l Run the tracert [ -a source-ip-address | -f first-ttl | -m max-ttl | -p port | -q nqueries | -vpn-
instance vpn-instance-name | -w timeout ] * host command to trace the gateways that the
packet passes by from the source to the destination.
l Run the ping lsp [ -a source-ip | -c count | -exp exp-value | -h ttl-value | -m interval | -r
reply-mode | -s packet-size | -t time-out | -v ] * vpn-instance vpn-name remote remote-
address mask-length command to check the connectivity of the L3VPN LSP.
----End
Example
After the VPN configuration, run the ping command with vpn-instance vpn-instance-name on
the PE to check whether the PE and the CEs that belong to the same VPN can communicate with
each other. If the ping fails, you can use the tracert command with vpn-instance vpn-instance-
name to locate the fault.
<Huawei> ping -vpn-instance vpna 10.1.1.1
PING 10.1.1.1: 56 data bytes, press CTRL_C to break
Reply from 10.1.1.1: bytes=56 Sequence=1 ttl=255 time=56 ms
Reply from 10.1.1.1: bytes=56 Sequence=2 ttl=255 time=4 ms
Reply from 10.1.1.1: bytes=56 Sequence=3 ttl=255 time=4 ms
Reply from 10.1.1.1: bytes=56 Sequence=4 ttl=255 time=52 ms
Reply from 10.1.1.1: bytes=56 Sequence=5 ttl=255 time=3 ms
--- 10.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 3/23/56 ms
If multiple interfaces bound to the same VPN exist on the PE, specify the source IP address (-
a source-ip-address) when you ping or tracert the remote CE that accesses the peer PE.
Otherwise, the ping or tracert may fail.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
148
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