3Com Switch 8800 Advanced Software V5 Configuration Guide

400 CHAPTER 33: TUNNELING CONFIGURATION
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CAUTION:
■ If the tunnel interface addresses at the two ends of a tunnel are not in the
same network segment, a forwarding route through the tunnel to the peer
must be configured so that the encapsulated packet can be forwarded. You
can configure static or dynamic routes. A forwarding route needs to be
configured at both ends of the tunnel. For the detailed configuration, refer to
“IP Routing and Routing Table” on page 187.
■ Two or more tunnel interfaces using the same encapsulation protocol must
have different source and destination addresses.
■ If the tunnel interface is the source interface, the tunnel source address is the
primary IP address of the source interface.
Configuration Example Network requirement
■ Switch A and Switch B are configured with IPv6 cards and IPv4 cards. In this
example, the tunnel type used for networking is an IPv6 manually configured
tunnel, on which the RIPng routing protocol is enabled.
■ IPv6 packets (destination IPv6 address is 6666::6) enter the tunnel from the
IPv6-supporting interface on Switch A. After encapsulation, the packets are
turned into IPv6 over IPv4 tunnel packets.
■ IPv6 over IPv4 tunnel packets are sent to the IPv4 network through the port
that supports IPv4 only.
■ After passing through the IPv4 network, tunnel packets enter the destination
dual-stack node, Switch B, through the port that supports IPv4 only.
■ On Switch B, the ACL is used to redirect tunnel packets from IPv4 cards to the
link aggregation group, whose service type is tunnel. This link aggregation
group is established over IPv6 cards.
■ After expedite termination on IPv6 cards, tunnel packets are forwarded from
IPv4 cards to the IPv6 network.
Configure the traffic
redirection action for the
traffic behavior
redirect { cpu | interface
interface-type
interface-number |
link-aggregation group
aggregation-group-id |
next-hop { ipv4-add [
ipv4-add ] | ipv6-add [
interface-type
interface-number ] [ ipv6-add
[ interface-type
interface-number ] ] } }
Required
Configure a service loopback
group ID to be referenced by
the tunnel interface
aggregation-group
aggregation-group-id
Required
Enable the expedite
termination function
expediting enable Optional
By default, the expedite
termination function is
disabled.
To do... Use the command... Remarks