3Com 3C13636 Configuration Manual page 848

3Com Router 3000 Ethernet Family
Configuration Guide
Table 2-3 Configure a topology-driven LSP setup policy
Configure a topology-driven LSP setup
policy
Disable the filtering condition specified by
the arguments and no routes of any type
can trigger the LSP setup
2.2.4 Configuring Static LSP
You can manually set an LSR to be a node along an LSP, and place a limit on the traffic
over the LSP. Depending on the position in an MPLS domain, LSR can be ingress,
transit node, or an egress. Note that the correct operation of this LSP can be ensured
only after the LSRs along the specified LSP have been properly configured.
The undo static-lsp command is used to delete a specified LSP established manually.
Perform the following configuration in MPLS view.
Table 2-4 Set this LSR to be a node on a specified LSP
Operation
Set the
LSR to be the
ingress
specified LSP
Set the
LSR to be a transit
node along
specified LSP
Set the
LSR to be the
egress
specified LSP
2.2.5 Configuring IP TTL Duplication of MPLS
The MPLS label contains an eight-bit TTL field same as the one used in an IP header. It
can be used for supporting the tracert command in addition to suppressing routing
loops.
As described in RFC3031, when an LSR labels a packet, it needs to copy the TTL value
in the IP packet or the upper layer label into the TTL field in the added label. When it
Operation
static-lsp
current
{ addr-mask | mask-length } | l2vpn } { nexthop next-hop-addr
| outgoing-interface interface-type interface-num } out-label
of a
out-label-value
undo static-lsp ingress lsp-name [ l2vpn ]
static-lsp transit lsp-name [ l2vpn ] incoming-interface
current
interface-type
{ nexthop next-hop-addr | outgoing-interface interface-type
the
interface-num } out-label out-label-value
undo static-lsp transit lsp-name [ l2vpn ]
current static-lsp egress lsp-name [ l2vpn ] incoming-interface
interface-type interface-num in-label in-label-value
of the
undo static-lsp egress lsp-name [ l2vpn ]
3Com Corporation
Chapter 2 MPLS Basic Capability Configuration
lsp-trigger { all | ip-prefix ip-prefix }
undo lsp-trigger { all | ip-prefix
[ ip-prefix ] }
Command
ingress lsp-name
interface-num }
2-3
Command
destination dest-addr
in-label in-label-value