R21xx-HP FlexFabric 11900 Layer 3 IP Routing Configuration Guide

4
Configuring route recursion
To use a route with an indirect next hop, a device must perform route recursion to find the outgoing
interface to reach the next hop.
Route recursion ensures the convergence speed of routes with indirect next hops.
To keep the routing table size, HP recommends not configuring route recursion when ECMP load sharing
is performed or too many route entries are available in the routing table.
The configuration takes effect at next reboot. Save the configuration before you reboot the device.
To configure a device to perform route recursion:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the device to
perform route recursion.
switch-mode route-iterative
By default, the device does
not perform route recursion.
Route redistribution
Route redistribution enables routing protocols to learn route information from each other. A dynamic
routing protocol can redistribute routes from other routing protocols, including direct and static routing.
For more information, see the respective chapters on those routing protocols in this configuration guide.
Configuring the maximum number of ECMP routes
This configuration takes effect at next reboot. Make sure the reboot does not impact your network.
To configure the maximum number of ECMP routes:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Configure the maximum
number of ECMP routes.
max-ecmp-num number
By default, the maximum
number of ECMP routes is 8.
3. (Optional.) Display the
maximum number of ECMP
routes.
display max-ecmp-num
You can execute the display
command in any view.
Displaying and maintaining a routing table
Execute display commands in any view and reset commands in user view.