Bgp Failover Configuration - Lenovo RackSwitch G8264 Application Manual

BGP Failover Configuration

1. Define the VLANs.
© Copyright Lenovo 2016
Use the following example to create redundant default gateways for a G8264 at a
Web Host/ISP site, eliminating the possibility, if one gateway goes down, that
requests will be forwarded to an upstream router unknown to the switch.
As shown in Figure 46, the switch is connected to ISP 1 and ISP 2. The customer
negotiates with both ISPs to allow the switch to use their peer routers as default
gateways. The ISP peer routers will then need to announce themselves as default
gateways to the G8264.
Figure 46. BGP Failover Configuration Example
Server 1
IP: 200.200.200.10
On the G8264, 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 the
switch as the primary default gateway. ISP 2, the secondary peer, is configured
with a metric of "3," thereby appearing to the switch to be three router hops away.
For simplicity, both default gateways are configured in the same VLAN in this
example. The gateways could be in the same VLAN or different VLANs
RS G8264(config)# vlan 1
Switch
IP: 200.200.200.1
IP: 210.210.210.1
BladeCenter
Server 2
IP: 200.200.200.11
Chapter 34: Border Gateway Protocol
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