Users Guide

Version Description
9.3(0.0) Introduced on the S4810, S4820T, S6000, and Z9000 platforms.
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 1/1
Dell(conf)#
ip max-frag-count
Set the maximum number of fragments allowed in one packet for packet re-assembly.
S4820T
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, 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.
9.2(1.0) Introduced on the Z9500.
IPv4 Routing 809