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Configuring IP SLA MPLS LSP Ping and Trace Operations
Command or Action
Step 5
Do one of the following:
• target ipv4 destination-address destination-mask
• target traffic-eng tunnel tunnel-interface
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
target ipv4 10.25.26.10 255.255.255.255
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
target ipv4 10.25.26.10/32
or
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
target traffic-eng tunnel 12
Step 6
lsp selector ipv4 ip-address
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
lsp selector ipv4 127.0.0.2
Step 7
force explicit-null
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
force explicit-null
Step 8
reply dscp dscp-bits
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
reply dscp 2
Step 9
reply mode router-alert
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
reply mode router-alert
Step 10
exp exp-bits
Example:
RP/0/RSP0/CPU0:router(config-ipsla-mpls-lsp-trace)#
exp 5
Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide, Release 4.2.x
252
Implementing IP Service Level Agreements
Purpose
Specifies the target destination of the MPLS LSP trace
operation as an LDP IPv4 address or MPLS traffic
engineering tunnel.
(Optional) Specifies the local host IPv4 address used to
select the LSP in the MPLS LSP ping operation.
(Optional) Adds an explicit null label to the label stack
of an LSP when an echo request is sent.
(Optional) Specifies the differentiated services codepoint
(DSCP) value to be used in echo reply packets.Valid
values are from 0 to 63.
Reserved keywords such as EF (expedited forwarding)
and AF11 (assured forwarding class AF11) can be
specified instead of numeric values.
(Optional) Sets echo requests to reply as an IPv4 UDP
packet with IP router alert. The router-alert reply mode
forces an echo reply packet to be specially handled by the
transit LSR router at each intermediate hop as it moves
back to the destination.
(Optional) Specifies the MPLS experimental field (EXP)
value to be used in the header of echo reply packets. Valid
values are from 0 to 7.
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