While Avaya’s Routed Split Multilink Trunk (RSMLT) functionality originally provided sub-
second failover for IPv4 forwarding only, the Avaya Ethernet Routing Switch 8800/8600
extends RSMLT functionality to IPv6. The overall model for IPv6 RSMLT is essentially identical
to that of IPv4 RSMLT. In short, RSMLT peers exchange their IPv6 configuration and track
each other’s state by means of IST messages. An RSMLT node always performs IPv6
forwarding on the IPv6 packets destined to the peer’s MAC addresses. When an RSMLT node
detects that its RSMLT peer is down, the node also begins terminating IPv6 traffic destined to
the peer's IPv6 addresses.
With RSMLT enabled, an SMLT switch performs IP forwarding on behalf of its SMLT peer –
thus preventing IP traffic from being sent over the IST.
IPv6 RSMLT supports the full set of topologies and features supported by IPv4 RSMLT,
including SMLT triangles, squares, and SMLT full-mesh topologies, with routing enabled on
the core VLANs.
With IPv6, you must configure the RSMLT peers using the same set of IPv6 prefixes.
Supported routing protocols include the following:
• IPv6 Static Routes
• OSPFv3
IPv4 IST with IPv6 RSMLT
Avaya Ethernet Routing Switch 8800/8600 does not support the configuration of an IST over
IPv6. IST is supported over IPv4 only.
Enabling RSMLT for IPv4 and IPv6
To enable IPv6 RSMLT, you must use the same configuration commands provided for IPv4
RSMLT. As none of the RSMLT configuration parameters depend on IP-specific information,
the configuration commands remain unchanged.
RSMLT configuration is a property of a VLAN. If you enable RSMLT on a VLAN and IPv4 and
IPv6 are enabled on the VLAN, then the RSMLT configuration is in effect for both protocols.
No additional or separate configuration parameters are available for configuring IPv6 RSMLT.
It is not possible to selectively enable or disable RSMLT for IPv4 only or IPv6 only.
Example network
The following figure shows a sample IPv6 RSMLT topology. It shows a typical redundant
network example with user aggregation, core, and server access layers. To minimize the
creation of many IPv6 prefixes, one VLAN (VLAN 1, IP prefix A) spans all wiring closets.
IPv6 RSMLT
Configuration — IPv6 Routing
November 2010 69
Summary of Contents for ERS 8600 series
Page 14: ...New in this release 14 Configuration IPv6 Routing November 2010...
Page 78: ...IPv6 routing configuration 78 Configuration IPv6 Routing November 2010...
Page 132: ...Basic IPv6 configuration using the ACLI 132 Configuration IPv6 Routing November 2010...
Page 176: ...IPv6 routing configuration using the CLI 176 Configuration IPv6 Routing November 2010...
Page 194: ...IPv6 routing configuration using the ACLI 194 Configuration IPv6 Routing November 2010...
Page 206: ...IPv6 DHCP Relay configuration using the CLI 206 Configuration IPv6 Routing November 2010...
Page 238: ...IPv6 VRRP configuration using the CLI 238 Configuration IPv6 Routing November 2010...
Page 250: ...IPv6 VRRP configuration using the ACLI 250 Configuration IPv6 Routing November 2010...
Page 262: ...IPv6 RSMLT configuration using the CLI 262 Configuration IPv6 Routing November 2010...
Page 268: ...IPv6 RSMLT configuration using the ACLI 268 Configuration IPv6 Routing November 2010...
Page 306: ...Multicast protocol configuration using the ACLI 306 Configuration IPv6 Routing November 2010...
Page 344: ...IPv6 traffic filter configuration using the ACLI 344 Configuration IPv6 Routing November 2010...
Page 398: ...CLI show commands 398 Configuration IPv6 Routing November 2010...