HP 12500 Series Configuration Manual page 81

Configuring a bypass tunnel on its PLR
After a tunnel is specified to protect an interface, its corresponding LSP becomes a bypass LSP. The setup
of a bypass LSP must be manually performed on the PLR. The configuration of a bypass LSP is similar to
that of a common LSP, but a bypass LSP cannot act as a primary LSP to be protected by another LSP at
the same time.
When specifying a bypass tunnel for an interface, ensure the following:
The bypass tunnel is up.
•
The protected interface is not the outgoing interface of the bypass tunnel.
•
Up to three bypass tunnels can be specified for a protected interface. The best-fit algorithm is used to
determine which of them is used in case failure occurs.
Your device has restriction on links that use the same bypass tunnel so that their total bandwidth does not
exceeds a specific value.
To configure a bypass tunnel on its PLR:
To do...
Enter system view
Enter interface view of the bypass
tunnel
Specify the destination address of
the bypass tunnel
Configure the bandwidth and type
of LSP that the bypass tunnel can
protect
Submit current tunnel configuration
Exit to system view
Enter interface view of the
outgoing interface of the protected
LSP
Bind the bypass tunnel with the
protected interface
CAUTION:
Bypass tunnels do not protect bandwidth by default. This can defeat your attempts to binding a primary
LSP to a bypass tunnel. Therefore, when configuring a bypass tunnel, you must configure the bandwidth
that it is intended to protect with the mpls te backup bandwidth command.
Configuring node protection
To use FRR for node protection, perform the tasks in this section on the PLR and the protected node. If you
only need to protect links, skip this section.
Use the command...
system-view
interface tunnel tunnel-number
destination ip-address
mpls te backup bandwidth
{ bandwidth | { ct0 | ct1 | ct2 |
ct3 } { bandwidth | un-limited } }
mpls te commit
quit
interface interface-type
interface-number
mpls te fast-reroute bypass-tunnel
tunnel tunnel-number
73
Remarks
––
––
Required
•
For node protection, this is the
LSR ID of the next hop router of
PLR.
•
For link protection, this is the
LSR ID of the next hop device of
PLR.
Required
Bandwidth is not protected by
default.
Required
––
––
Required