MAP Example¶

Environment¶

MAP Border Relay
Item	Value
MAP Domain Name	cpoc
IPv6 Prefix	2001:db8::/32
IPv6 Source Prefix	1234:5678:90ab:cdef::/64
IPv4 Prefix	192.168.1.0/24
Port Set Length	8
Port Set Offset	0
Embedded Address Bits	16
MTU	1300
Interface	GigabitEthernet0/14/0
IPv6 Address	fd01:2::1/64
IPv4 Address	203.0.113.2/24

TNSR Border Relay Configuration¶

This shows an example Border Relay (BR) configuration in TNSR to provide service to MAP-T Customer Edge (CE) clients. This example assumes some configuration details are already in place, such as the IPv4 prefix already being routed to the BR from upstream, and default routes configured in TNSR for upstream gateways.

First, configure the interface connected to the upstream network. There could be separate interfaces for reaching the Internet and for reaching the CE network, but this example uses a single interface.

tnsr(config)# interface GigabitEthernet0/14/0
tnsr(config-interface)# ip address 203.0.113.2/24
tnsr(config-interface)# ipv6 address fd01:2::1/64
tnsr(config-interface)# exit

Next, configure the MAP domain:

tnsr(config)# nat nat64 map cpoc
tnsr(config-map)# ipv4 prefix 192.168.1.0/24
tnsr(config-map)# ipv6 prefix 2001:db8::/32
tnsr(config-map)# ipv6 source 1234:5678:90ab:cdef::/64
tnsr(config-map)# embedded-address bit-length 16
tnsr(config-map)# port-set length 4
tnsr(config-map)# port-set offset 6
tnsr(config-map)# mtu 1280
tnsr(config-map)# exit

Then add a static route:

tnsr(config)# route table default
tnsr(config-route-table)# route 2001:db8::/32
tnsr(config-rttbl6-next-hop)# next-hop 0 via fd01:2::2
tnsr(config-rttbl6-next-hop)# exit
tnsr(config-route-table)# exit

Lastly, enable MAP and MAP-T translation for the interface:

tnsr(config)# interface GigabitEthernet0/14/0
tnsr(config-interface)# map translate
tnsr(config-interface)# map enable
tnsr(config-interface)# exit