Manual Bypass Tunnel For Frr Configuration Example - HP FlexNetwork 10500 Series Configuration Manual

# Trace the path that MPLS TE tunnel 3 traverses. The output shows that the used CRLSP is the one
that traverses Switch B.
[SwitchA] tracert mpls te tunnel 3
MPLS trace route TE tunnel Tunnel3
TTL Replier
0
1 10.1.1.2
2 20.1.1.2
# Shut down interface VLAN-interface 2 on Switch B, and then tracert tunnel 3. The output shows
that packets are forwarded on the CRLSP that traverses Switch D.
[SwitchA] tracert mpls te tunnel 3
MPLS trace route TE tunnel Tunnel3
TTL Replier
0
1 30.1.1.2
2 40.1.1.2
# Verify that only one CRLSP exists on Switch A.
[SwitchA] display mpls lsp
FEC
1.1.1.9/3/34313
30.1.1.2
Tunnel3
# Execute the display ip routing-table command on Switch A. The output shows a static route entry
with interface Tunnel 3 as the output interface. (Details not shown.)

Manual bypass tunnel for FRR configuration example

Network requirements
On the primary CRLSP Switch A—Switch B—Switch C—Switch D, use FRR to protect the link
Switch B—Switch C.
Use RSVP-TE to establish the primary CRLSP and bypass tunnel based on the constraints of the
explicit paths to transmit data between the two IP networks. The bypass tunnel uses path Switch
B—Switch E—Switch C. Switch B is the PLR and Switch C is the MP.
Configure BFD for RSVP-TE between Switch B and Switch C. When the link between Switch B and
Switch C fails, BFD can detect the failure quickly and notify RSVP-TE of the failure, so RSVP-TE can
switch traffic to the bypass tunnel.
Time Type Downstream
Ingress 10.1.1.2/[1147]
1 ms Transit 20.1.1.2/[3]
2 ms Egress
Time Type Downstream
Ingress 30.1.1.2/[1148]
2 ms Transit 40.1.1.2/[3]
3 ms Egress
Proto In/Out Label
RSVP -/1150
Local -/-
Local -/-
136
Interface/Out NHLFE
Vlan4
Vlan4
NHLFE1029