Avaya 8800 Planning And Engineering, Network Design page 93

Network redundancy
Figure 28: IPv6 RSMLT network example
In the VLAN 3 portion of the network shown in the preceding figure, routers R1 and R2 provide
RSMLT-enabled IPv6 service to hosts H1 and H2. Router R1 can be configured as the default IPv6
router for H1 and R2 can be the default router for H2. R1 is configured with the link-local address of
fe80::1, the global unicast address 2003::1, and the routing prefix of 2003::/64 (as a shorthand, the
last two items are referred to as 2003::1/64). R2 is configured with fe80::2 and 2003::2/64.
Host H1 sends its IPv6 traffic destined to VLAN 1 to R1's MAC address (after resolving the default
router address fe80::1 to R1's MAC). H2 sends its traffic to R2's MAC. When an IPv6 packet
destined to R1's MAC address is received at R2 on its SMLT links (which is the expected MLT
behavior), R2 performs IPv6 forwarding on the packet and does not bridge it over the IST. The same
behavior occurs on R1.
At startup, R1 and R2 use the IST link to exchange full configuration information including MAC
address for the IPv6 interfaces residing on SMLT VLAN 3.
June 2016 Planning and Engineering — Network Design 93
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