08-20-2011 07:47 AM - edited 03-07-2019 01:47 AM
Hey mates
I hope you are doing well
so i have a question could someone assist me?
we have switched topology and I want to implement arp inspection with no-dhcp
while configuring production topology I got several problems
I have server that have several interfaces
I have servers that configured micro. NLB with virtula mac addres
I have Blade system that have several server also dns and etc.
while configuring arp inspection i got lots of problems
so I need to bind several ip to mac in one interface and prevent arp spoofs etc.
and also to prevent users who can change its ip to server ip in other word prevent ip conflict
in interface which connected to nlb crying abt invalid arp also in pther server which has several interfaces
any idea? how I should manage this problem
Thanks
Config...
ip arp inspection vlan 8
ip arp inspection validate src-mac ip
ip arp inspection log-buffer entries 512
ip arp inspection filter av8 vlan 8
arp access-list av8
permit ip host************* mac host********
permit ip host ****************mac host *************
permit ip host ****************mac host**************
permit ip host ************** mac host ***************
09-04-2011 02:41 AM
Hello,
Your idea is correct - you define a static IP-to-MAC ARP access list and use it in the Dynamic ARP Inspection configuration. Even the configuration snippet you've provided seems to be correct. Do you feel it is not working as expected for you?
Best regards,
Peter
09-04-2011 03:07 AM
Hi Peter
Its working good but only with end hosts
with server which has several interfaces it gives errors invalid arp or dhcp snooping problem
I want to implement arp inspection with server which has several interfaces or nlb
but it disbles it after pps expired I configured pps to 100 but it gives me lots of arp errors
How can I mange such problem I mean checkin the error types in cisco page it says that its an arp spoofing and how can I make sure if there arp spoofing in my local lan
I am not sure that it should be spoofing
Thanks
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