3Com MSR 50 Series Configuration Manual page 1371

To do...
Enter MPLS TE tunnel interface view interface tunnel
Configure the tie breaker used
when multiple paths are present in
a CSPF calculation for the current
tunnel
Submit current tunnel
configuration
n
For a tunnel, the tie breaker configured in MPLS TE tunnel interface view is
preferred to the one configured in MPLS view. If no tie breaker is configured in
MPLS TE tunnel interface view, the one configured in MPLS view applies.
Configuring route pinning
Route pinning cannot be used together with reoptimization or automatic
bandwidth adjustment.
Follow these steps to configure route pinning:
To do...
Enter system view
Enter MPLS TE tunnel interface
view
Enable route pinning
Submit current tunnel
configuration
Configuring administrative group and affinity attribute
The affinity attribute of an MPLS TE tunnel identifies the properties of the links
that the tunnel can use. Together with the link administrative group, it decides
which links the MPLS TE tunnel can use.This is done by ANDing the 32-bit affinity
attribute with the 32-bit link administrative group attribute. When doing that, a
32-bit mask is used. The affinity bits corresponding to the 1s in the mask are "do
care" bits which must be considered while those corresponding to the 0s in the
mask are "don't care" bits.
For a link to be used by a TE tunnel, at least one considered affinity bit and its
corresponding administrative group bit must be set to 1.
Suppose the affinity of an MPLS TE tunnel is 0xFFFFFFFF and the mask is
0x0000FFFF. For a link to be used by the tunnel, the leftmost 16 bits of its
administrative group attribute can be 0s or 1s, but at least one of the rest bits
must be 1.
The affinity of an MPLS TE tunnel is configured at the first node on the tunnel and
then signaled to the rest nodes through CR-LDP or RSVP-TE.
n
The associations between administrative groups and affinities may vary by vendor.
Follow these steps to configure the administrative group and affinity attribute:
Use command to...
tunnel-number
mpls te tie-breaking
{ least-fill | most-fill |
random }
mpls te commit
Use command to...
system-view
interface tunnel tunnel-number
mpls te route-pinning
mpls te commit
Tuning CR-LSP Setup 1371
Remarks
--
Optional
The random keyword
applies by default.
Required
Remarks
--
--
Required
Disabled by default
Required.