HP HPE FlexNetwork 7500 series, Configuration Manual

Page: 18 / 592

6
Configuring RIB NSR
IMPORTANT:
Use this feature with protocol GR or NSR to avoid route timeouts and traffic interruption.
When an active/standby switchover occurs, nonstop routing (NSR) backs up routing information
from the active process to the standby process to avoid routing flapping and ensure forwarding
continuity.
RIB NSR provides faster route convergence than protocol NSR during an active/standby switchover.
Configuring IPv4 RIB NSR
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter RIB view.
rib
N/A
3. Create the RIB IPv4 address
family and enter its view.
address-family ipv4
By default, no RIB IPv4
address family exists.
4. Enable IPv4 RIB NSR.
non-stop-routing
By default, RIB NSR is
disabled.
Configuring IPv6 RIB NSR
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter RIB view.
rib
N/A
3. Create the RIB IPv6 address
family and enter its view.
address-family ipv6
By default, no RIB IPv6
address family exists.
4. Enable IPv6 RIB NSR.
non-stop-routing
By default, RIB NSR is
disabled.
Configuring inter-protocol FRR
CAUTION:
This feature uses the next hop of a route from a different protocol as the backup next hop for the
faulty route, which might cause loops.
Inter-protocol fast reroute (FRR) enables fast rerouting between routes of different protocols. A
backup next hop is automatically selected to reduce the service interruption time caused by
unreachable next hops. When the next hop of the primary link fails, the traffic is redirected to the
backup next hop.
Among the routes to the same destination in the RIB, a router adds the route with the highest
preference to the FIB table. For example, if a static route and an OSPF route in the RIB have the
same destination, the router adds the OSPF route to the FIB table by default. The next hop of the
static route is selected as the backup next hop for the OSPF route. When the next hop of the OSPF
route is unreachable, the backup next hop is used.