3Com MSR 50 Series Configuration Manual page 1382

1382 C 77: MPLS TE C
HAPTER ONFIGURATION
To do...
Enter tunnel interface view of
the primary LSP
Enable FRR
Submit current tunnel
configuration
Configuring a bypass tunnel on its PLR
After a tunnel is specified to protect an interface, its corresponding LSP becomes a
bypass LSP. Setting up a bypass LSP must be manually performed on its headend,
also called point of local repair (PLR), which must be a part of the primary LSP but
must not be the tail of the primary LSP.
Configuring a bypass LSP is the same as configuring a common LSP except that
you cannot configure the FRR attribute on a bypass LSP. In other words, an LSP
cannot be both primary and bypass. In addition, nested LSP protection is not
allowed.
When specifying a bypass tunnel for an interface, make sure that:
The bypass tunnel is up.
■
The protected interface is not its own outgoing interface.
■
Up to three bypass tunnels can be specified for a protected interface. The best-fit
algorithm is used to determine which of them should be 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 specified value.
Follow these steps 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
Use command to...
interface tunnel tunnel-number
mpls te fast-reroute
mpls te commit
Use command to...
system-view
interface tunnel
tunnel-number
destination ip-address
mpls te backup bandwidth
{ bandwidth | { bc0 | bc1 }
{ bandwidth | un-limited } }
mpls te commit
quit
Remarks
--
Required
Disabled by default
Required
Remarks
--
--
Required
For node protection, this is
■
the LSR ID of the next hop
device 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
--