Maximum ARP Entries on a Sup720

Unanswered Question
Jan 14th, 2008
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Hi All,

Just a very quick one. Is there any physical limitation to how many ARP entries a 6509 and sup720 can have?

Just checking if there is any physical limitation.

Kindest regards,


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Overall Rating: 5 (1 ratings)
zhenningx Tue, 07/03/2012 - 06:59
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Hello, the above link is broken. Can someone post an updated link to this question?


Ivan Shirshin Tue, 07/03/2012 - 07:51
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Not sure what this link is about but the limitations are as the following:

1. on 6500 the tested and recommended limit is 30k. Note that this is not a hard limit and in theory it is limited only byt he available DRAM.

2. on 7600 running 12.2(33)SRD2 ARP scales to 512k (static or dynamic)—This feature is supported with  3CXL versions of the Cisco 7600 Series ES+ line cards with  RSP720-3CXL-GE with 2G SP memory or RSP720-3CXL-10GE with 2G SP memory.

On 7600 you can change this limit:

Kind Regards,

**Please grade this post if you find it useful.

Ivan Shirshin Tue, 07/10/2012 - 09:10
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Please rate the posts if those are useful and close the thread in case your questions is answered. This will be helpful to others looking for the same information.

Kind Regards,


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