R0106-HP MSR Router Series MPLS Configuration Guide(V7)
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Ste
p
Command
Remarks
4. Enter area view.
area area-id N/A
5. Enable MPLS TE for the OSPF
area.
mpls te enable
By default, an OSPF area does not
support MPLS TE.
Configuring IS-IS TE
IS-IS TE uses a sub-TLV of the extended IS reachability TLV (type 22) to carry TE attributes. Because the
extended IS reachability TLV carries wide metrics, specify a wide metric-compatible metric style for the
IS-IS process before enabling IS-IS TE. Available metric styles for IS-IS TE include wide, compatible, or
wide-compatible. For more information about IS-IS, see Layer 3—IP Routing Configuration Guide.
Because of the following conditions, specify an MTU that is equal to or greater than 512 bytes on each
IS-IS enabled interface for IS-IS LSPs to be flooded on the network:
• The length of the extended IS reachability TLV might reach the maximum of 255 bytes.
• The LSP header takes 27 bytes and the TLV header takes two bytes.
• The LSP might also carry the authentication information.
To configure IS-IS TE:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Create an IS-IS process and
enter IS-IS view.
isis [ process-id ] By default, no IS-IS process exists.
3. Specify a metric style.
cost-style { wide |
wide-compatible | compatible
[ relax-spf-limit ] }
By default, only narrow metric style
packets can be received and sent.
For more information about this
command, see Layer 3—IP Routing
Command Reference.
4. Enable MPLS TE for the IS-IS
process.
mpls te enable [ Level-1 | Level-2 ]
By default, an IS-IS process does not
support MPLS TE.
5. Specify the types of the
sub-TLVs for carrying DS-TE
parameters.
te-subtlv { bw-constraint value |
unreserved-bw-sub-pool value } *
By default, the bw-constraint
parameter is carried in sub-TLV 252,
and the unreserved-bw-sub-pool
parameter is carried in sub-TLV 251.
Configuring MPLS TE tunnel constraints
Perform this task on the ingress node of the MPLS TE tunnel.
Configuring bandwidth constraints for an MPLS TE tunnel
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter MPLS TE tunnel interface
view.
interface tunnel tunnel-number
[ mode mpls-te ]
N/A