Cisco GRS Configuration Manual page 83

Implementing Carrier Grade NAT on Cisco IOS XR Software
2 You can configure routes to the CGSE using these steps.
3 This step shows the output of show cgn tunnel v6rd 6rd1 statistics command.
RP/0/RP0/CPU0:#show cgn tunnel v6rd 6rd1 statistics
Tunnel 6rd configuration
=========================
Tunnel 6rd name: 6rd1
IPv6 Prefix/Length: 2001:db8::/32
Source address: 9.1.1.1
BR Unicast address: 2001:db8:901:101::1
IPv4 Prefix length: 0
IPv4 Suffix length: 0
TOS: 0, TTL: 255, Path MTU: 1280
Tunnel 6rd statistics
======================
OL-32659-01
• Configure 6rd Prefix, BR source IPv4 address & unicast IPv6 address in a single commit.
• address-family command binds IPv4 & IPv6 Serviceapp interface to a particular 6rd instance 6rd1,
for transmitting and receiving 6rd traffic.
router(config)#
service cgn demo
service-type tunnel v6rd 6rd1
br
ipv6-prefix 2001:B000::/28
source-address 100.1.1.1
unicast address 2001:B006:4010:1010::1
!
address-family ipv4
interface ServiceApp4
!
address-family ipv6
interface ServiceApp6
Unicast address specifies a unique IPv6 address for a particular CGSE. This is used as
Note
a source IPv6 address while replying to IPv6 ICMP queries destined for BR IPv6 anycast
address.
The Unicast address also provides the source IPv6 address during IPv4 ICMP translation
to IPv6 ICMP.
• To divert the traffic towards CGSE which is destined for BR
router(config)#
router static
address-family ipv4 unicast
100.1.1.1/32 1.1.1.2
• Packets destined to 6rd prefix are routed to CGSE
Router#show route ipv6
S 2001:b000::/28 is directly connected,00:13:44, ServiceApp6
S 2001:b006:4010:1010::/60 is directly connected,00:19:24, Null0
S 2001:b006:4010:1010::/128 is directly connected,00:13:44, ServiceApp6
S 2001:b006:4010:1010::1/128 is directly connected,00:13:44, ServiceApp6
C 5000::/64 is directly connected,00:13:44, ServiceApp6
L 5000::1/128 is directly connected,00:13:44, ServiceApp6
C 2001:db8::/64 is directly connected,01:23:55, GigE0/1/1/4
L 2001:db8::2/128 is directly connected,01:23:55, GigE0/1/1/4
Cisco IOS XR Carrier Grade NAT Configuration Guide for the Cisco CRS Router, Release 5.2.x
(Serviceapp4 NextHop)
Configuring IPv6 Rapid Development
73