Administrator Guide

NOTE: The Dell Networking OS does not suppress the ICMPv4 message type Echo request (8).
Table 12. Suppressed ICMPv6 message types
ICMPv6 Message Types
Destination unreachable (1)
Time exceeded (3)
IPv6 header bad (4)
Echo reply (129)
Who are you request (139)
Who are you reply (140)
Mtrace response (200)
Mtrace messages (201)
NOTE:
The Dell Networking OS does not suppress the following ICMPv6 message types:
• Packet too big (2)
• Echo request (128)
• Multicast listener query (130)
• Multicast listener report (131)
• Multicast listener done (132)
• Router solicitation (133)
• Router advertisement (134)
• Neighbor solicitation (135)
• Neighbor advertisement (136)
• Redirect (137)
• Router renumbering (138)
• MLD v2 listener report (143)
• Duplicate Address Request (157)
• Duplicate Address Confirmation (158)
drop icmp
Drops the ICMPv4 and ICMPv6 packets.
Syntax
drop {icmp | icmp6}
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
9.11.0.0 Introduced on the S4810, S4820T, S3048–ON, S3100 Series, S4048–ON, S5000, S6000,
S6000–ON, Z9500, Z9100–ON, S6100–ON, S6010–ON, S4048T–ON, C9000, and MXL.
Usage Information
When the drop icmp feature is configured, the system drops the ICMP reply messages on the front end and
management interfaces. By default, the Dell Networking OS responds to all the ICMP messages.
NOTE: There is no separate CLI to enable IP ID randomness. By default, the IP ID in the kernel is
randomized.
For more information on the ICMP message types, see the ICMP Commands section.
1466 Security