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Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 34 Configuring MPLS, MPLS VPN, MPLS OAM, and EoMPLS
Configuring MPLS OAM and IP SLAs MPLS
MPLS OAM Configuration Guidelines
Follow these guidelines when configuring MPLS OAM:
Note
The switch does not support traffic engineering FEC in this release.
•
Because MPLS OAM detects problems in the MPLS LSP network, it is a useful tool when there is
a discrepancy between the MPLS LSP and IP networks or between the MPLS control plane and data
plane.
•
When the switch is used as a provider router in the core and ECMP tree trace is configured, the
switch can force the LSP packet down only one path, the actual data path.
Using LSP Ping for LDP IPv4 FEC
When you enter the ping mpls privileged EXEC command to begin an LSP ping operation, the keyword
that follows specifies the Forwarding Equivalence Class (FEC) that is the target of the LCP ping to which
you want to verify connectivity.
Beginning in privileged EXEC mode, follow these steps to configure LSP LDP IPv4 ping:
Command
Purpose
Step 1
ping mpls ipv4
destination-address
destination-mask [destination
address-start address-end
increment] [exp exp-bits] [interval
ms] [pad pattern] [repeat count]
[reply dscp dscp-value] [reply
mode {ipv4 | router-alert}]
[revision {1 | 2 | 3}] [size
packet-size | sweep minimum
maximum size-increment] [source
source-address] [timeout seconds]
[ttl time-to-live] [verbose]
[revision tlv-revision-number]
[force-explicit-null] [output
interface interface-id [nexthop
ip-address]] [dsmap [hashkey
{none | ipv4 bitmap bitmap-size}
[flags fec]
Configure LSP IPv4 ping. The keywords have these meanings:
•
destination-address destination-mask—Specify the address and network
mask of the target FEC.
•
(Optional) destination address-start address-end increment —Enter the
destination 127 network address range.
•
(Optional) exp exp-bits—Specify the MPLS experimental-field value in
the MPLS header for an echo reply. The range is from 0 to 7. The default
is 0.
•
(Optional) interval ms—Specify the time in milliseconds between
successive MPLS echo requests. The range is 0 to 3600000 ms; the default
is 0 (no interval is configured).
•
(Optional) pad pattern—Specify to use the pad TLV to fill the datagram
so that the MPLS echo request is the specified size.
•
(Optional) repeat count—Specify the number of times to resend the
packet. The range is from 1 to 2147483647. If you do not enter the repeat
keyword, the packet is sent 5 times.
•
(Optional) reply dscp dscp-value—Specify a specific class of service
(CoS) in an echo reply by providing a differentiated services code point
(DSCP) value.
