IPv6 Routing Configuration
Fixed Switch Configuration Guide 25-7
C5(su)->router(Config)#show ipv6 interface vlan 100
Vlan 100 Administrative Mode Enabled
Vlan 100 IPv6 Routing Operational Mode Enabled
IPv6 is Enabled
IPv6 Prefix is FE80::211:88FF:FE55:4A7F/128
3FFE:501:FFFF:101:211:88FF:FE55:4A7F/64
Routing Mode Enabled
Interface Maximum Transmit Unit 1500
Router Duplicate Address Detection Transmits 1
Router Advertisement NS Interval 0
Router Advertisement Lifetime Interval 1800
Router Advertisement Reachable Time 0
Router Advertisement Min Interval 200
Router Advertisement Max Interval 600
Router Advertisement Managed Config Flag Disabled
Router Advertisement Other Config Flag Disabled
Router Advertisement Suppress Flag Disabled
Creating Tunnel Interfaces
IPv6 over IPv4 tunnels allow delivery of IPv6 packets over an IPv4 infrastructure. The IPv6
packets are encapsulated in IPv4 packets at one end of the tunnel and unencapsulated at the other
end. Both endpoints of the tunnel must support both IPv4 and IPv6 protocol stacks.
The Enterasys Fixed Switches that support IPv6 allow you to manually configure an IPv6 over
IPv4 point-to-point tunnel, specifying both the source and destination endpoints of the tunnel.
The interfaces that are used as the endpoints of a tunnel must be configured with both an IPv4
address and an IPv6 address.
Before you create a tunnel interface with the commands shown in Procedure 25-3, make sure that
the interface that will be the source of the tunnel has been configured with an IPv4 address.
Figure 25-1 on page 25-8 illustrates a point-to-point IPv6 over IPv4 tunnel. The code example
following the figure shows the commands used to configure the tunnel on both ends. Note that
Procedure 25-3 Creating Tunnel Interfaces
Step Task Command(s)
1. In global configuration mode, create the tunnel
interface and enable tunnel interface
configuration mode.
interface tunnel tunnel-id
2. In router tunnel interface configuration mode,
specify the IPv4 source transport address of the
tunnel.
It the source is a VLAN, it must already exist.
tunnel source {ipv4-addr | interface
vlan vlan-id}
3. Specify the IPv4 destination transport address of
the tunnel.
tunnel destination ipv4-addr
4. Specify the tunnel mode. Currently, only IPv6-
over-IPv4 is supported.
tunnel mode ipv6ip
5. Configure an IPv6 address on the tunnel
interface.
ipv6 address {ipv6-addr/prefix-
length | ipv6-prefix/prefix-length
eui64}
6. In router global configuration mode or privileged
exec mode, display general information.
show ipv6 interface tunnel tunnel-id
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