146
FRR configuration example
Network requirements
On a primary LSP Switch A Switch B Switch C
→
→
Switch D, use FRR to protect the link Switch B
→
→
Switch C.
•
Create a bypass LSP that traverses the path Switch B Switch
→
E Switch C. Switch B is the PLR and
→
Switch C is the MP.
•
Explicitly route the primary TE tunnel and the bypass TE tunnel with the signaling protocol being
RSVP-TE.
Figure 36
Network diagram
Device
Interface
IP address
Device
Interface
IP address
Switch A
Loop0
1.1.1.1/32
Switch E
Loop0
5.5.5.5/32
Vlan-int1
2.1.1.1/24
Vlan-int4
3.2.1.2/24
Switch B
Loop0
2.2.2.2/32
Vlan-int5
3.3.1.1/24
Vlan-int1
2.1.1.2/24
Switch C
Loop0
3.3.3.3/32
Vlan-int2
3.1.1.1/24
Vlan-int3
4.1.1.1/24
Vlan-int4
3.2.1.1/24
Vlan-int2
3.1.1.2/24
Switch D
Loop0
4.4.4.4/32
Vlan-int5
3.3.1.2/24
Vlan-int3
4.1.1.2/24
Configuration procedure
1.
Assign IP addresses and masks to interfaces (see
). (Details not shown.)
2.
Configure the IGP protocol:
# Enable IS-IS to advertise host routes with LSR IDs as destinations on each node. (Details not
shown.)
Execute the
display ip routing-table
command on each switch. You can see that all nodes have
learned the host routes of other nodes with LSR IDs as destinations. Take Switch A for example:
<SwitchA> display ip routing-table
Routing Tables: Public
Destinations : 13 Routes : 13
Destination/Mask Proto Pre Cost NextHop Interface
1.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
2.1.1.0/24 Direct 0 0 2.1.1.1 Vlan1
2.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
Switch A
Switch B
Switch C
Switch D
Switch E
Vlan-int1
Loop0
Loop0
Loop0
Loop0
Vlan-int1
Vlan-int2
Vlan-int2
Vlan-int3
Vlan-int3
Vlan-int4
Vlan-int4
Primary LSP
Bypass LSP
Vlan-int5
Vlan-int5
Loop0
