Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 466)

438 Multi-Service IronWare Routing Configuration Guide
53-1003033-02
DHCP relay agent for IPv6
Enabling support for network-based ECMP load
sharing for IPv6
If network-based ECMP load sharing is configured, traffic is distributed across equal-cost paths
based on the destination network address. Routes to each network are stored in CAM and
accessed when a path to a network is required. Because multiple hosts are likely to reside on a
network, this method uses fewer CAM entries than load sharing by host. When you configure
network-based ECMP load sharing, you can choose either of the following CAM modes:
• Dynamic mode – In the dynamic mode, routes are entered into the CAM dynamically using a
flow-based scheme, where routes are only added to the CAM as they are required. Once routes
are added to the CAM, they can be aged-out when they are not in use. Because this mode
conserves CAM, it is useful for situations where CAM resources are stressed or limited.
• Static mode – In the static mode, routes are entered into the CAM whenever they are
discovered. Routes are not aged once routes are added to the CAM and can be aged-out when
they are not in use.
IPv6 VPN CAM supports ECMP load sharing, which is created for IPv6 VPN routes.
Configuring the CAM mode to support network-based
ECMP load sharing for IPv6
To configure the CAM mode to support network-based ECMP load sharing for IPv6, enter a
command such as the following at the Global Configuration level.
Brocade(config)# cam-mode ipv6 dynamic
Syntax: [no] cam-mode ipv6 [dynamic | static | host]
The dynamic parameter configures the device for network-based ECMP load sharing using the
dynamic CAM mode.
The static parameter configures the device for network-based ECMP load sharing using the static
CAM mode.
The host parameter configures the device for host-based ECMP load sharing using the dynamic
CAM mode.
You must restart the device for this command to take effect.
Displaying ECMP load-sharing information for IPv6
To display the status of ECMP load sharing for IPv6, enter the following command.
Brocade# show ipv6
Global Settings
unicast-routing enabled, ipv6 allowed to run, hop-limit 64
reverse-path-check disabled
urpf-exclude-default disabled
session-logging-age 5
No Inbound Access List Set
No Outbound Access List Set
Prefix-based IPv6 Load-sharing is Enabled, Number of load share paths: 4
source-route disabled, forward-source-route disabled
Configured Static Routes: 66