Connectivity Guide

Parameters None
Default None
Command Mode ROUTER-BGP
Usage Information This mode allows you to apply BGP congurations to non-default VRFs.
Example
OS10(config)#router bgp 100
OS10(config-router-bgp-100)#
OS10(config-router-bgp-100)#vrf vrf_test1
OS10(config-router-bgp-100-vrf)#
Supported Releases 10.3.0E or later
weight
Assigns a default weight for routes from the neighbor interfaces.
Syntax
weight number
Parameters number—Enter a number as the weight for routes, from 1 to 4294967295.
Default 0
Command Mode ROUTER-BGP-NEIGHBOR
Usage Information The path with the highest weight value is preferred in the best-path selection process. The no version of this
command resets the value to the default.
Example
OS10(conf-router-bgp-neighbor)# weight 4096
Supported Releases 10.3.0E or later
Equal cost multi-path
ECMP is a routing technique where next-hop packet forwarding to a single destination occurs over multiple best paths. When you enable
ECMP, OS10 uses a hash algorithm to determine the next-hop. The hash algorithm makes hashing decisions based on values in various
packet elds and internal values.
• Congure the hash algorithm in CONFIGURATION mode.
hash-algorithm ecmp crc
Change hash algorithm
OS10(config)# hash-algorithm ecmp crc
Load balancing
To increase bandwidth of ECMP routes, trac is balanced across member links. RTAG7 is a hash algorithm that load balances trac within
a trunk group in a controlled manner. RTAG7 balances trac to more eectively use member links as trac gets more diverse.
RTAG7 generates a hash that consists of two parts:
• The rst part generates from packet headers to identify micro-ows in trac. By default, all listed parameters are enabled for load
balancing except the ingress port.
OS10# show load-balance
Layer 3
385