138
Fast Reroute protection: None
# Tracert MPLS TE tunnel 3. The output shows that the used CRLSP is the one that traverses Router
B.
[RouterA] tracert mpls te tunnel 3
MPLS trace route TE tunnel Tunnel3
TTL Replier Time Type Downstream
0 Ingress 10.1.1.2/[1147]
1 10.1.1.2 1 ms Transit 20.1.1.2/[3]
2 20.1.1.2 2 ms Egress
# Shut down interface GigabitEthernet 2/0/2 on Router B, and then tracert tunnel 3. The output
shows that packets are forwarded on the CRLSP that traverses Router D.
[RouterA] tracert mpls te tunnel 3
MPLS trace route TE tunnel Tunnel3
TTL Replier Time Type Downstream
0 Ingress 30.1.1.2/[1148]
1 30.1.1.2 2 ms Transit 40.1.1.2/[3]
2 40.1.1.2 3 ms Egress
# Execute the
display mpls lsp
command on Router A. The output shows that only one CRLSP
exists on the router.
[RouterA] display mpls lsp
FEC Proto In/Out Label Interface/Out NHLFE
1.1.1.9/3/34313 RSVP -/1150 POS2/2/1
30.1.1.2 Local -/- POS2/2/1
Tunnel3 Local -/- NHLFE1029
# Execute the
display ip routing-table
command on Router 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 Router A—Router B—Router C—Router D, use FRR to protect the link
Router B—Router C.
Use RSVP-TE to establish the primary CRLSP and bypass tunnel of the MPLS TE tunnel based on
the constraints of the explicit paths. The bypass tunnel uses path Router B—Router E—Router C.
Router B is the PLR and Router C is the MP.
Configure BFD for RSVP-TE between Router B and Router C. When the link between Router B and
Router 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.
Содержание HPE FlexNetwork MSR Router Series
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