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New Member

ARP Cache

On which device or IOS release static ARP cache is not required.

Thanks in advance

8 REPLIES
Purple

Re: ARP Cache

Unless you have specific requirements, you do not need to enter in static ARP entries on any devices. By default, dynamic entries are built up based on ARP responses.

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: ARP Cache

But i am not able to see the Mac address of servers in FWSM 2.3.

Bronze

Re: ARP Cache

Hello,

the FWSM has no ports for servers to connect to, so you will not be able to see ARP entries for your servers on the FWSM. You need to check the ARP cache on a Layer 3 device.

Regards,

Nethelper

Re: ARP Cache

Hello,

do you have connectivity to your servers from the FWSM? Can you ping them? How did you setup your FWSM. in which VLANs are your servers? Are the servers reachable by the clients? Are you sure you are not bypassing the FWSM?

Regards, Martin

New Member

Re: ARP Cache

yes am able to reach the servers from FWSM.

but one thing does the 6513 gives only the attached intefaces ARP ? what is the case in L2 and FWSM should we need to statically configure ARP.

thanks

Purple

Re: ARP Cache

Hi Aksher,

A device only needs MAC addresses (and hence, ARP entries) for other devices to which it is connected at Layer 2. For example, if there are two devices connected to a switch and within the same VLAN, they need to use ARP to determine each other's MAC addresses. If the devices need to communicate through a Layer 3 device, they only need to know the MAC address of the gateway device's interface to them.

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: ARP Cache

That's fine Paresh .i know it very well. What actually i meant was an L2/L3 will show all the arp entries in a clustered switching environment or will it show only the adjacent interfaces ARP resolution when we use

sh ip arp

thanks

Purple

Re: ARP Cache

'sh ip arp' will only show you the ARP entries for ARP responses learned by the specific switch. It will not be replicated across any other switches in the cluster.

Paresh.

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