Specifications

ping mpls
MP-385
Cisco IOS Multiprotocol Label Switching Command Reference
January 2010
Command Default You cannot check MPLS LSP connectivity.
Command Modes Privileged EXEC (#)
Command History
verbose (Optional) Displays the MPLS echo reply sender address of the packet and
di
splays return codes.
revision
t
lv-revision-number
(Optional) Cisco TLV revision number.
force-explicit-null (Optional) Forces an explicit null label to be added to the MPLS label stack
e
ven though the label was unsolicited.
output interface
tx-
interface
(Optional) Specifies the output interface for echo requests.
nexthop ip
-address (Optional) Causes packets to go through the specified next-hop address.
dsmap (Optional) Interrogates a transit router for downstream mapping (DSMAP)
in
formation.
hashkey {none | ipv
4
bitmap bitmap-size}
(Optional) Allows you to control the hash key and multipath settings. Valid
values are:
none—T
here is no multipath (type 0).
ipv4 bitmap bi
tmap-size—Size of the IPv4 addresses (type 8) bitmap.
If you enter the none k
eyword, multipath LSP traceroute acts like enhanced
LSP traceroute; that is, it uses multipath LSP traceroute retry logic and
consistency checking.
flags fec (Optional) Allows Forward Equivalence Class (FEC) checking on the
t
ransit router. A downstream map TLV containing the correct received
labels must be present in the echo request for target FEC stack checking to
be performed.
Target FEC stack validation is always done at the egress router. Be sure to
use
this keyword in conjunction with the ttl keyword.
Release Modification
12.0(27)S This command was introduced.
12.2(18)SXE The r
eply dscp and reply pad-tlv keywords were added.
12.4(6)T The following keywords were added: r
evision, force-explicit-null, output
interface, dsmap, hashkey, none, ipv4 bitmap, and flags fec.
12.2(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB and
i
mplemented on the Cisco 10000 series routers.
12.0(32)SY This command was integrated into Cisco IOS Release 12.0(32)SY.
12.4(11)T This command was integrated into Cisco IOS Release 12.4(11)T.
12.2(31)SB2 This command was integrated into Cisco IOS Release 12.2(31)SB2. The
ne
xthop keyword was added.
12.2(33)SXI This command was integrated into Cisco IOS Release 12.2(33)SXI.