User guide

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flush FDB entries associated with the uplinks to the ESRP-enabled BlackDiamond
switches.
The following commands are used to configure both BlackDiamond switches. The
assumption is that the inter-router backbone is running OSPF, with other routed VLANs
already properly configured. Similar commands would be used to configure a switch on
a network running RIP. The primary requirement is that the IP address for the VLAN(s)
running ESRP must be identical. In this scenario, the master is determined by the
programmed MAC address of the switch, because the number of active links for the
VLAN and the priority are identical to both switches.
The commands used to configure the BlackDiamond switches are as follows:
create vlan sales
config sales add port 1:1-1:4
config sales ipaddr 10.1.2.3/24
enable ipforwarding
enable esrp sales
enable edp ports all
config ospf add vlan sales
enable ospf
MULTIPLE VLANS USING LAYER 2 REDUNDANCY
The example shown in Figure 10-9 illustrates an ESRP configuration that has multiple
VLANs using layer 2 redundancy.