Is-Is Frr Configuration Example - HPE 5800 Series Configuration Manual

IPV4 Destination
--------------------------------------------------------------------------
14.14.14.0/24
44.44.44.44/32
12.12.12.0/32
22.22.22.22/32
The output shows that the neighbor relationships and routing information on Switch A and
Switch B have not changed, which means the neighbors cannot sense the switchover on
Switch S.

IS-IS FRR configuration example

Network requirements
Switch S, Switch A, and Switch D belong to the same IS-IS routing domain as illustrated in
Configure IS-IS FRR so that when the link between Switch S and Switch D fails, traffic is switched to
Link B immediately.
Figure 54 Network diagram
Loop 0
1.1.1.1/32
Configuration procedure
Configure IP addresses and subnet masks for interfaces on the switches. (Details not shown.)
1.
Configure IS-IS on the switches to make sure Switch A, Switch D, and Switch S can
2.
communicate with each other at Layer 3. (Details not shown.)
Configure IS-IS FRR:
3.
Enable IS-IS FRR to either automatically calculate a backup next hop, or designate a backup
next hop by using a referenced routing policy.
(Method I.) Enable IS-IS FRR to automatically calculate a backup next hop:
# Configure Switch S.
<SwitchS> system-view
[SwitchS] bfd echo-source-ip 1.1.1.1
[SwitchS] isis 1
[SwitchS-isis-1] fast-reroute auto
[SwitchS-isis-1] quit
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
ISIS(1) IPv4 Level-2 Forwarding Table
-------------------------------------
IntCost
10
10
10
10
Flags: D-Direct, R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set
Vlan-int200
13.13.13.1/24
Switch S
ExtCost ExitInterface
NULL vlan200
NULL Loop0
NULL
NULL
Switch A
Link B
Link A
Vlan-int200
13.13.13.2/24
160
NextHop
Direct
Direct
Loop 0
4.4.4.4/32
Switch D
Flags
D/L/-
D/-/-
Figure 54.