Cisco ASR 900 Series User Manual

DescriptionOption
A valid 127/8 address. You have the option to specify
a single x.y.z or a range of numbers between 0.0.0
and x.y.z , where x.y.z are numbers between 0 and 255
and correspond to 127.x.y.z. Use the destination
{address | address-start address-end increment}
keyword and arguments.
The MPLS echo request destination address in the
UDP packet is not used to forward the MPLS packet
to the destination device. The label stack that is used
to forward the echo request routes the MPLS packet
to the destination device. The 127/8 address
guarantees that the packets are routed to the localhost
(the default loopback address of the device processing
the address) if the UDP packet destination address is
used for forwarding.
In addition, the destination address is used to affect
load balancing when the destination address of the IP
payload is used for load balancing.
For use with IPv4 and Any Transport over MPLS
(AToM) Forwarding Equivalence Classes (FECs)
with the MPLS LSP Ping feature and with IPv4 FECs
with the MPLS LSP Traceroute feature.
UDP destination address
A parameter you can set that indicates the maximum
number of hops a packet should take to reach its
destination. The time-to-live (TTL) field in a packet
is decremented by 1 each time it travels through a
device.
For MPLS LSP Ping, the TTL is a value after which
the packet is discarded and an MPLS echo reply is
sent back to the originating device. Use the ttl
time-to-live keyword and argument.
For MPLS LSP Traceroute, the TTL is a maximum
time to live and is used to discover the number of
downstream hops to the destination device. MPLS
LSP Traceroute incrementally increases the TTL value
in its MPLS echo requests (TTL = 1, 2, 3, 4, ...) to
accomplish this. Use the ttl time-to-live keyword and
argument.
Time-to-live (TTL)
A parameter you can specify to control the timeout
in seconds for an MPLS request packet. The range is
from 0 to 3600 seconds. The default is 2.
Set with the timeout seconds keyword and argument.
For use with the MPLS LSP Ping and Traceroute
features.
Timeouts
MPLS Basic Configuration Guide, Cisco IOS XE Everest 16.5.1 (Cisco ASR 900 Series)
77
MPLS LSP Ping, Traceroute, and AToM VCCV
Command Options for ping mpls and trace mpls

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English