Reference Guide

Command Mode ROUTER-BGP
Usage
Information
This mode enables you to apply BGP configurations 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. OS10
uses a hashing algorithm to determine the next-hop when you enable ECMP. The hashing algorithm makes hashing decisions
based on values in various packet fields as well as some internal values.
● Configure the hash algorithm in CONFIGURATION mode.
hash-algorithm ecmp crc
Change hash algorithm
OS10(config)# hash-algorithm ecmp crc
Load balancing
RTAG7 is a hashing algorithm that load balances traffic within a trunk group in a controlled manner. To effectively increase the
bandwidth of ECMP routes, traffic is balanced across member links. The balancing is performed by using the RTAG7 hashing,
which is designed to have the member links used effectively as the traffic profile gets more diverse.
The RTAG7 hash scheme generates a hash that consists of two parts:
● The first part is primarily generated from packet headers to identify micro-flows in traffic. By default, all listed parameters
are enabled for load balancing except the ingress port.
OS10# show load-balance
Load-Balancing Configuration For LAG and ECMP:
336
Layer 3