H3C Technologies H3C S5560 Series Switches - Manual (Page 369)

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does not process the packets. If you are certain that all packets are trustworthy, disable the zero field
check to save CPU resources.
To configure RIPng zero field check:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIPng view.
ripng [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Enable the zero field check on
incoming RIPng packets.
checkzero By default, this feature is enabled.
Configuring the maximum number of ECMP routes
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIPng view.
ripng [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A
3. Configure the maximum
number of ECMP routes.
maximum load-balancing number
By default, the maximum number of
RIPng ECMP routes equals the
maximum number of ECMP routes
supported by the system.
Use the max-ecmp-num command
to configure the maximum number
of ECMP routes supported by the
system. For more information
about the max-ecmp-num
command, see Layer 3—IP Routing
Command Reference.
Configuring RIPng GR
GR ensures forwarding continuity when a routing protocol restarts or an active/standby switchover
occurs.
Two routers are required to complete a GR process. The following are router roles in a GR process:
• GR restarter—Graceful restarting router. It must have GR capability.
• GR helper—A neighbor of the GR restarter. It helps the GR restarter to complete the GR process.
After RIPng restarts on a router, the router must learn RIPng routes again and updates its FIB table, which
causes network disconnections and route reconvergence.
With the GR feature, the restarting router (known as the GR restarter) can notify the event to its GR
capable neighbors. GR capable neighbors (known as GR helpers) maintain their adjacencies with the
router within a configurable GR interval. During this process, the FIB table of the router does not change.
After the restart, the router contacts its neighbors to retrieve its FIB.
By default, a RIPng-enabled device acts as the GR helper. Perform this task on the GR restarter.