Product guide

Router Redundancy Using XRRP
Overview of XRRP Operation
■ Multiple VLAN Considerations – When using multiple VLANs, some
consideration must be given to whether the router interfaces are
connected to devices that have a multiple forwarding database (a MAC
address table for each VLAN):
• If the switch at the other end of a router interface connection has a
multiple forwarding database, you can use a separate interface for
each VLAN. Since the switch at the other end has a separate MAC
address table for each VLAN, the fact that the router uses the same
MAC address on all interfaces causes no problems.
4108GL Switch
VLAN 1
VLAN 2
5300xl, 4200vl, 3400cl, or 6400cl
Switch (Routing Enabled)
VLAN 1
VLAN 2
Both switches have
multiple forwarding
databases.
Figure 12-8. Example of a Valid Topology for Devices Having Multiple Forwarding
Databases in a Multiple VLAN Environment
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