Alteon Application Switch Operating System Application Guide
Border Gateway Protocol
132 Document ID: RDWR-ALOS-V2900_AG1302
Figure 15: Example BGP Failover Configuration
On Alteon, one peer router (the secondary one) is configured with a longer AS path than the other,
so that the peer with the shorter AS path will be seen by Alteon as the primary default gateway. ISP
2, the secondary peer, is configured with a metric of 3, appearing to Alteon to be three router hops
away.
Example
1. Configure Alteon as you normally would for Server Load Balancing (SLB).
— Assign an IP address to each of the real servers in the server pool.
— Define each real server.
— Define a real server group.
— Define a virtual server.
— Define the port configuration.
For more information about SLB configuration, see Server Load Balancing, page 165
.
2. Define the VLANs.
For simplicity, both default gateways are configured on the same VLAN in this example. The
gateways could be in the same VLAN or different VLANs.
3. Define the IP interfaces.
>> # /cfg/l2/vlan 1
(Select VLAN 1)
>> vlan 1# add <port number>
(Add a port to the VLAN membership)
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