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Configuration Guide - VPN

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of VPN, including GRE, BGP/MPLS IP VPN, BGP/MPLS IPv6 VPN, VLL, PWE3, and VPLS.
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Verifying the Network Connectivity and Reachability

Verifying the Network Connectivity and Reachability

Context

After the VPN configuration is complete, run the ping command with ipv6 vpn-instance vpn-instance-name on the PE to check whether the PE and the CE that belongs to the same VPN can communicate with each other. If the ping operation fails, use the tracert command with ipv6 vpn-instance vpn-instance-name to locate the faulty node.

If multiple interfaces bound with the same VPN exist on the PE, specify the source IP address. That is, specify -a source-ipv6-address when using the ping command to check the connection to the remote CE that accesses the peer PE. If you do not specify a source IP address, the PE selects the smallest IPv6 address of the interface bound to the IPv6 VPN. The PE uses the selected IP address as the source address of the ICMPv6 packet. If the CE does not have the route to the selected IPv6 address, the ICMPv6 packet sent back from the peer PE is discarded.

Procedure

  • Run the ping ipv6 [ -a source-ipv6-address | -c count | -m time | -name | -s packetsize | -t timeout | -tc traffic-class-value | vpn-instance vpn-instance-name ] * host [ -i interface-type interface-number ] command to check whether the IPv6 network is correctly established to send IPv6 packets from the transmitting end to the destination address.
  • Run the tracert ipv6 [ -f first-hop-limit | -m max-hop-limit | -name | -p port-number | -q probes | -s packetsize | -v | -w timeout | vpn-instance vpn-instance-name ] * host command to check the gateways through which the IPv6 packets are sent from the transmitting end to the destination address.
  • Run the ping [ ip ] [ -8021p 8021p-value | -a source-ip-address | -c count | { -f | ignore-mtu } | -h ttl-value | -nexthop nexthop-ip-address | -i interface-type interface-number | -m time | -name | -p pattern | -q | -r | -ri | { -s packetsize | -range [ min min-size | max max-size | step step-size ] * } | -system-time | -t timeout | { -tos tos-value | -dscp dscp-value } | -v | -vpn-instance vpn-instance-name | -detail ] * host [ ip-forwarding ] command to check whether the IPv4 backbone network is correctly established to send IPv4 packets from the transmitting end to the destination address.
  • Run the tracert [ -a source-ip-address | -f first-ttl | -m max-ttl | -name | -p port | -q nqueries | -s packetsize | -v | -vpn-instance vpn-instance-name | -w timeout ] * host command to check the gateways through which the IPv4 packets are sent from the transmitting end of the IPv4 backbone network to the destination address of the IPv4 backbone network.
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Updated: 2019-04-03

Document ID: EDOC1100075353

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