Administrator Guide

Usage
Information
You can enable the mechanism to configure the source or the originating interface
from which the packet (the device that generates the ICMP error messages) is
received by the switch to send the loopback address instead of its source IP
address to be used in the ICMP unreachable messages and in the traceroute
command output. The loopback address must be unique in a particular domain.
In network environments that contain a large number of devices, ranging up to
thousands of systems, and with each device configured for equal-cost multipath
(ECMP) links, you cannot effectively and optimally use the traceroute and ping
applications to examine the network reachablity and identify any broken links for
diagnostic purposes. In such cases, if the reply that is obtained from each hop on
the network path contains the IP address of the adjacent, neighboring interface
from which the packet is received, it is difficult to employ the ping and traceroute
utilites. You can enable the ICMP unreachable messages to contain the loopback
address of the source device instead of the previous hop's IP address to be able to
easily and quickly identify the device and devices along the path because the DNS
server maps the loopback IP address to the hostname and does not translate the IP
address of every interface of the switch to the hostname.
Example
Dell(conf)#ipv6 icmp source-interface tengigabitethernet 0/0
Dell(conf)#
ip max-frag-count
Set the maximum number of fragments allowed in one packet for packet re-assembly.
Z9000
Syntax
ip max-frag-count count
To place no limit on the number of fragments allowed, use the no ip max-frag-
count
command.
Parameters
count Enter a number for the number of fragments allowed for re-
assembly. The range is from 2 to 256.
Defaults No limit is set on number of fragments allowed.
Command
Modes
CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version 9.0.2.0 Introduced on the S6000.
742
IPv4 Routing