3Com S7902E, Configuration Manual

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1.1.1.9:2054 3.3.3.9 -/Vlan4 Tunnel1
Configuring ordinary CR-LSP backup is almost the same as configuring hot CR-LSP backup except that
you need to replace the
mpls te backup hot-standby
command with the
mpls te backup ordinary
command. Unlike in hot CR-LSP backup where a secondary tunnel is created immediately upon
creation of a primary tunnel, in ordinary CR-LSP backup, a secondary CR-LSP is created only after the
primary LSP goes down.
6) Create a static route for routing MPLS TE tunnel traffic
[SwitchA] ip route-static 20.1.1.2 24 tunnel 3 preference 1
Perform the
display ip routing-table
command on Switch A. You can find a static route entry with
Tunnel1 as the outgoing interface.
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 and use BFD to detect the status of link Switch B → Switch C.
Do the following:
z
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.
z
Explicitly route the primary TE tunnel and the bypass TE tunnel with the signaling protocol being
RSVP-TE.
Figure 1-10
Link protection using the FRR approach
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
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