Administrator Guide

● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
● For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the
slot/port information.
● For a Loopback interface, enter the keyword loopback then a number from 0
to 16383.
● For a port channel interface, enter the keywords port-channel then a
number.
● For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Defaults Not configured.
Command Modes CONFIGURATION
Command
History
Version Description
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 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.
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.
IPv4 Routing 597