Administrator Guide

Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S4810, S4820T, S6000, and Z9000 platforms.
Usage Information
You can enable the mechanism to congure 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 congured for equal-cost multipath (ECMP) links, you cannot eectively 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 dicult 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 gigabitethernet 1/1
Dell(conf)#
ip max-frag-count
Set the maximum number of fragments allowed in one packet for packet re-assembly.
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-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
IPv4 Routing 763