Express ARP Cache limits per vlan

[drjarmon]

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

[Anonymous]

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

[Anonymous]

Don,

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

Thanks,

Evan