Showing results for 
Search instead for 
Did you mean: 

DHCP-Snooping command on catos


I am trying to find a command for dhcp snooping rate-limiting on a CatOS. The PFC card is PFC.

PFC3B is said to support that command. But there seems no this command.



-6k> (enable) sh ver

WS-C6509-E Software, Version NmpSW: 8.4(5)

Copyright (c) 1995-2005 by Cisco Systems

NMP S/W compiled on Aug  3 2005, 13:26:46

System Bootstrap Version: 12.2

System Web Interface Version: Engine Version: 5.3.4 ADP Device: Cat6000 ADP Version: 7.1 ADK: 49

System Boot Image File is 'bootdisk:cat6000-sup32pfc3cvk9.8-4-5.bin'

System Configuration register is 0x2102

Hardware Version: 1.2  Model: WS-C6509-E  Serial #:

Mod Port Model               Serial #    Versions

--- ---- ------------------- ----------- --------------------------------------

1   48   WS-X6148-GE-45AF    SAL09486P7X Hw : 1.1

                                         Fw : 7.2(1)

                                         Sw : 8.4(5)

2   48   WS-X6148-GE-45AF    SAL09486P9V Hw : 1.1

                                         Fw : 7.2(1)

                                         Sw : 8.4(5)

3   48   WS-X6148-GE-45AF    SAL09486P7K Hw : 1.1

                                         Fw : 7.2(1)

                                         Sw : 8.4(5)

5   9    WS-SUP32-GE-3B      SAL10019AEY Hw : 4.2

                                         Fw : 12.2

                                         Fw1: 8.4(5)

                                         Sw : 8.4(5)

                                         Sw1: 8.4(5)

         WS-F6K-PFC3B        SAL10019ACD Hw : 2.1==>PFC3B is said to support that command.

                                         Sw :

15  1    WS-F6K-MSFC2A       SAL100194W9 Hw : 3.0

                                         Fw : 12.2(17d)SXB11

                                         Sw : 12.2(17d)SXB11

       DRAM                    FLASH                   NVRAM

Module Total   Used    Free    Total   Used    Free    Total Used  Free

------ ------- ------- ------- ------- ------- ------- ----- ----- -----

5      262144K 122891K 139253K 249772K  14980K 234792K 2048K  347K 1701K

Uptime is 1183 days, 1 hour, 41 minutes

3 Replies 3

ajay chauhan
Rising star
Rising star

Basic Configuration

Configure DHCP Snooping on a port or ports;

(enable) set port dhcp-snooping mod/ports trust {enable | disable}

Note: Use the enable or disable keywords to make the port trusted or untrusted.

DHCP Snooping Address Binding

A switch with DHCP Snooping enabled will maintain a 'binding' table mapping MAC address, IP address, Lease time, Vlan and port details for each current DHCP client. The table can be examined and manipulated with the following commands;

To examine the table;

(enable) show dhcp-snooping bindings [ip_addr | MAC_addr | port | vlan]

To delete an entry from the bindings database;

(enable) clear dhcp-snooping bindings [ip_addr mac_addr  port int_id  valn vlan_num]

To clear the entire snooping binding table;

(enable) clear dhcp-snooping bindings

Verification Commands

(enable) show dhcp-snooping bindings            Show the entire bindings table.

(enable) show dhcp-snooping config                Show details of current configuration.

(enable) show dhcp-snooping statistics           DHCP snooping statistics.


thanks, but i only need to know the command that limiting the rate. any idea?


Rising star
Rising star


The "ip dhcp snooping limit rate" IOS command cannot be used with your hybrid. To my knowledge the only way to rate limit the DHCP snooping with CatOS is to use the "set security acl feature ratelimit" command, but this one limits shared rate of the DHCP snooping, ARP inspection and 802.1X-DHCP (in actual fact only two of these for your case as DHCP snooping and 802.1X-DHCP are mutually exclusive).

Best regards,


Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Recognize Your Peers