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drjarmon
New Contributor III

Express ARP Cache limits per vlan

Adtran 1544 Gen 2 Spec sheet has ARP Entries listed 512 per interface / 1000 Total.  Would less than 512 active IP addresses per VLAN be a recommended best practice?

Thanks for Insight.

Don

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Anonymous
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Re: Express ARP Cache limits per vlan

Don:

It depends on the nature of your network and the IP subnetting scheme you're using.

512 ARP entries for a VLAN would imply that you were setting up an IP subnet that is /23, which would give you 512 host addresses. That's not something I would normally recommend unless there were very specific circumstances that required that large of a broadcast domain.

Most customers use a standard /24 or even smaller subnets, so the ARP cache limit of 512 isn't an issue.

Regards,

Ronnie Colvin

Adtran Applications Engineering

evanh
Contributor III
Contributor III

Re: Express ARP Cache limits per vlan

Don,

I am marking this assumed answered. However, if you have more to add please do not hesitate to do so.

Thanks,

Evan