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CloudEngine 12800 and 12800E V200R005C10 Configuration Guide - IP Unicast Routing
This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.
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Configuring OSPFv3 IP FRR
Configuring OSPFv3 IP FRR
Applicable Environment
With
the development of networks, Voice over IP (VoIP) and on-line video
services require high-quality real-time transmission. Nevertheless,
if an OSPFv3 fault occurs, traffic can be switched to a new link after
far more than 50 ms, which does not meet the requirement for real-time
services on the network.
Normally, traffic can be switched
to a new link after the following processes: fault detection in milliseconds,
notifying the fault to the routing control plane in milliseconds,
generating and flooding new topology information in tens of milliseconds,
triggering SPF calculation in tens of milliseconds, and notifying
and installing a new route in hundreds of milliseconds. As a result,
all the processes take far more than 50 milliseconds.
With OSPFv3 IP FRR that calculates a backup link in advance, devices
can rapidly switch traffic to the backup link without interrupting
services when the primary link becomes faulty. This protects traffic
and greatly improves the reliability of OSPFv3 networks.
Pre-configuration Tasks
Before Configuring
OSPFv3 IP FRR, complete the following tasks:
An OSPFv3 process is enabled, and the OSPFv3
view is displayed.
Run frr
The OSPFv3 IP FRR view is displayed.
Run loop-free-alternate
OSPFv3 IP FRR is enabled, and a loop-free
backup link is generated.
OSPFv3 can generate a loop-free backup link only when
the OSPFv3 IP FRR traffic protection inequality is met.
(Optional) Run frr-policy routeroute-policyroute-policy-name
An OSPFv3 IP FRR filtering policy is configured.
After the OSPFv3 IP FRR filtering policy is configured,
only the OSPFv3 backup routes that match the filtering conditions
of the policy can be added to the forwarding table.
(Optional) Run tiebreaker { node-protecting | lowest-cost } preferencepreference
The solution of selecting a backup path for
OSPFv3 IP FRR is set.
By default, the
solution of selecting a backup path for OSPFv3 IP FRR is node-protection
path first. In some cases, the solution needs to be changed to smallest-cost
path first because of data forwarding capacity or link cost consideration.
By default, the bigger-cost path is selected as the backup path. To
change the solution of selecting a backup path for OSPFv3 IP FRR to
smallest-cost path first, run the tiebreaker command.
After the command is run, smallest-cost path is selected as the backup
path.
Run commit
The configuration is committed.
(Optional) Blocking FRR on an OSPFv3 Interface
In system view, run: interfaceinterface-type interface-number
The view of the OSPFv3 interface
running FRR is displayed.
Run ospfv3 frr block [ instanceinstance-id ]
FRR is blocked on the OSPFv3 interface.
Run commit
The configuration is committed.
(Optional) Binding IP FRR and BFD
OSPFv3 IP FRR requires the lower layer to fast respond to the
link change so that traffic can be rapidly switched to the backup
link if the primary link fails.
Bind IP FRR and BFD in an OSPFv3 process.
Run system-view
The system view is displayed.
Run ospfv3
An
OSPFv3 process is enabled, and the OSPFv3 view is displayed.
Run bfd all-interfacesfrr-binding
IP FRR and BFD are bound in the OSPFv3 process.
Run commit
The
configuration is committed.
Bind IP FRR and BFD on a specified OSPFv3 interface.
Run system-view
The system view is displayed.
Run interfaceinterface-typeinterface-number
An interface view is displayed.
Run ospfv3 bfdfrr-binding
IP FRR and
BFD are bound on the interface.
Run commit
The
configuration is committed.
Verifying the Configuration
Run the display ospfv3 [ process-id ] routingverbose command
to view the primary link and backup link after OSPFv3 IP FRR is enabled.
