Hello Everyone - Am I correct in saying the following?
The ip verify source interface command enables ip source checking based on the
L3 address to port mapping based on either static entries using the ip source
command, or the dhcp snooping database.
When you add the port-security statement on
Hi all
With DHCP snooping, in the following link, I see that binding type can be
dhcp-snooping.
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_20_se/configuration/guide/swdhcp82.html
Switch# show ip dhcp snooping binding vlan 20
MacAddress IpAddress
Kings,
If i remember correctly you donot configure dhcp snooping bindings via
global config mode, you do it from exec mode.
Give that a try.
Stu
On Tue, Jan 5, 2010 at 11:54 AM, Kingsley Charles
kingsley.char...@gmail.com wrote:
Hi all
With DHCP snooping, in the following link, I see
Yeah...it is from the exec mode.
Does the entry survive reload?
Regards.
From: Stuart Hare stu...@ipexpert.com
To: Kingsley Charles kingsley.char...@gmail.com
Cc: ccie_security@onlinestudylist.com
Sent: Tue, January 5, 2010 1:22:59 PM
Subject: Re: [OSL |
Thanks Stu. You are correct.
I have one more query.
*ip verify source *will use dhcp snooping binding learnt dynamically or
manually with ip dhcp snooping binding commands to filter the frames.
Where will the following command come into picture?
*ip source binding 0100.0022.0010 vlan 10
Kings
You would use one or the other not both.
If you are using DHCP for dynamic address allocation, use the dhcp
snoop binding table, for verification. The source guard manual binding is
primarily for providing feature compatibility with static ip addressed
systems.
Stu
On Tue, Jan 5, 2010 at
Hi Stu
Will dhcp snooping not use local clock?
With regards
Kings
On Tue, Jan 5, 2010 at 6:23 PM, Stuart Hare stu...@ipexpert.com wrote:
Yup thats correct, its there to ensure that lease times are accurate.
If the clock is not sync'd binding entries are not inserted into the table.
Stu
Hi,
although it is true that DAI by default inspects only frame/packet
source addresses
on untrausted port ingress, - DAI _may_ inspect the ARP body addresses as well:
ip arp inspection validate {src-mac|dest-mac|ip}
src-mac - Checks the source MAC address in the Ethernet header
Check out this extract from the DHCP Snooping config guide for the 3560:
*•Follow these guidelines when configuring the DHCP snooping binding
database: *
*–Because both NVRAM and the flash memory have limited storage capacity, we
recommend that you store the binding file on a TFTP server. *
Ubaid,
I was able to get this working in 12.4(24)T2 and 12.4(15)T9. I will state
that most likely they are using 12.4(15)T in the lab right now. Ubaid did
you use the same configuration as I am showing below?
R7(config-if)#
Jan 5 19:54:12.286: %SEC-6-IPACCESSLOGP: list TCP_FLAGS
that is correct Michael.
Regards,
Tyson Scott - CCIE #13513 RS, Security, and SP
Technical Instructor - IPexpert, Inc.
Mailto: mailto:tsc...@ipexpert.com tsc...@ipexpert.com
Telephone: +1.810.326.1444, ext. 208
Live Assistance, Please visit: http://www.ipexpert.com/chat
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