Brocade BigIron RX Series Configuration Guide - Manual (Page 1257)

BigIron RX Series Configuration Guide 1179
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ECMP load sharing for IPv6
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Brocade devices support the following ECMP load-sharing methods for IPv6 traffic:
• Network-based – The Brocade device distributes traffic across equal-cost paths based on
destination network address. The software selects a path based on a calculation involving the
maximum number of load-sharing paths allowed and the actual number of paths to the
destination network. This is the default ECMP load-sharing method for IPv6.
• Host-based – The Brocade device uses a simple round-robin mechanism to distribute traffic
across the equal-cost paths based on destination host IP address. The device uses this ECMP
load-sharing method for IPv6 if you explicitly configure it to do so.
You can manually disable or enable ECMP load sharing for IPv6, specify the number of equal-cost
paths the device can distribute traffic across, and configure the device to use the host-based ECMP
load-sharing method instead of the network-based method. In addition, you can display
information about the status of ECMP load-sharing on the device, as well as the entries in the IPv6
forwarding cache.
Disabling or re-enabling ECMP load sharing for IPv6
ECMP load sharing for IPv6 is enabled by default. To disable the feature, enter the following
command.
BigIron RX(config)# no ipv6 load-sharing
If you want to re-enable the feature after disabling it, you must specify the number of load-sharing
paths. The maximum number of paths the device supports is a value from 2 – 8. By entering a
command such as the following, iPv6 load-sharing will be re-enabled.
BigIron RX(config)# ipv6 load-sharing 4
Syntax: [no] ipv6 load-sharing<num>
The <num> parameter specifies the number of paths and can be from 2 – 8. The default is 4..
Changing the maximum number of load sharing paths
for IPv6
By default, IPv6 ECMP load sharing allows traffic to be balanced across up to four equal paths. You
can change the maximum number of paths the device supports to a value from 2 – 8.
To change the number of ECMP load sharing paths for IPv6, enter a command such as the
following.
BigIron RX(config)# ipv6 load-sharing 8
Syntax: [no] ipv6 load-sharing [<num>]
The <num> parameter specifies the number of paths and can be from 2 – 8. The default is 4.
Changing the ECMP load-sharing method for IPv6
Brocade devices can perform ECMP load-sharing for IPv6 traffic based on destination host address
or destination network. The default is network-based IP load sharing. If you want to enable the
device to perform host-based IP load sharing instead, enter the following command.
BigIron RX(config)# ipv6 load-sharing 4