Setup Guide

bgp dmzlink-bw
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 no shutdown
neighbor 4.4.4.2 remote-as 2
neighbor 4.4.4.2 dmzlink-bw
neighbor 4.4.4.2 no shutdown
neighbor 5.5.5.2 remote-as 2
neighbor 5.5.5.2 dmzlink-bw
neighbor 5.5.5.2 no shutdown
R3#
interface tengigbitethernet 1/1
ip address 1.1.1.3/24
no shutdown
interface fortyGigE 1/48
ip address 3.3.3.1/24
no shut
router bgp 1
maximum-paths ebgp 2
bgp dmzlink-bw
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 no shutdown
neighbor 3.3.3.2 remote-as 2
neighbor 3.3.3.2 dmzlink-bw
neighbor 3.3.3.2 no shutdown
R4#
interface tengigbitethernet 1/1
ip address 4.4.4.2/24
no shut
router bgp 2
maximum-paths ebgp 2
bgp dmzlink-bw
neighbor 4.4.4.1 remote-as 1
neighbor 4.4.4.1 dmzlink-bw
neighbor 4.4.4.1 no shutdown
R5#
interface tengigbitethernet 1/1
Ip address 5.5.5.2/24
no shut
interface fortGigE 1/48
ip address 3.3.3.2/24
no shut
router bgp 2
maximum-paths ebgp 2
bgp dmzlink-bw
neighbor 5.5.5.1 remote-as 1
neighbor 5.5.5.1 dmzlink-bw
neighbor 5.5.5.1 no shutdown
neighbor 3.3.3.1 remote-as 1
neighbor 3.3.3.1 dmzlink-bw
Dynamic Re-calculation of Link Bankwidth
The Link cost associated with a port channel interface (LAG) changes whenever a member is added or deleted.
Continuous link apping results in the re-calculation of the link costs. This behaviour also causes unnecessary processing overhead on the
device as it advertises these changed link costs to its peers and updates its RTM when ever there is a change in the member status.
To avoid the re-calculation of Link costs for continuous link aps, the updated link cost is re-calculated using a timer. This timer is activated
every ve minutes to check if there is any change in the link cost associated with the EBGP neighbors (directly connected).
Equal Cost Multi-Path (ECMP)
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