Adding A Loopback Interface; Changing The Maximum Number Of Paths For Bgp4 Load Sharing - Dell PowerConnect B-RX Configuration Manual

To change the router ID, enter a command such as the following.
BigIron RX(config)# ip router-id 209.157.22.26
Syntax: ip router-id <ip-addr>
The <ip-addr> can be any valid, unique IP address.
NOTE
You can specify an IP address used for an interface on the BigIron RX, but do not specify an IP
address in use by another device.

Adding a loopback interface

You can configure the router to use a loopback interface instead of a specific port or virtual routing
interface to communicate with a BGP4 neighbor. A loopback interface adds stability to the network
by working around route flap problems that can occur due to unstable links between the router and
its neighbors.
Loopback interfaces are always up, regardless of the states of physical interfaces. Loopback
interfaces are especially useful for IBGP neighbors (neighbors in the same AS) that are multiple
hops away from the router. When you configure a BGP4 neighbor on the router, you can specify
whether the router uses the loopback interface to communicate with the neighbor. As long as a
path exists between the router and its neighbor, BGP4 information can be exchanged. The BGP4
session is not associated with a specific link but instead is associated with the virtual interfaces.
NOTE
If you configure the BigIron RX to use a loopback interface to communicate with a BGP4 neighbor,
the peer IP address on the remote router pointing to your loopback address must be configured.
To add a loopback interface, enter commands such as the following.
BigIron RX(config-bgp)# exit
BigIron RX(config)# int loopback 1
BigIron RX(config-lbif-1)# ip address 10.0.0.1/24
Syntax: interface loopback <num>
The <num> value can be from 1 – 8.

Changing the maximum number of paths for BGP4 load sharing

Load sharing enables the device to balance traffic to a route across multiple equal-cost paths of
the same type (EBGP or IBGP) for the route.
To configure the device to perform BGP4 load sharing:
•
•
BigIron RX Series Configuration Guide
53-1001810-01
Enable IP load sharing if it is disabled.
Set the maximum number of paths. The default maximum number of BGP4 load sharing paths
is 1, which means no BGP4 load sharing takes place by default. Refer to
maximum number of shared BGP4 paths"
Adding a loopback interface
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