Posted on March 12, 2019 3:57 am
 |  Asked by Louis Bolanos
 |  163 views
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Hello,

I have not been able to find anything in EOS documentation on the maximum amount of secondary IP addresses (and vrrp) one can have under a single interface. Is it listed anywhere?

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Posted by Aesha Parikh
Answered on March 25, 2019 7:14 pm

Hi Louis,

Different platforms will have different scale value on maximum supported virtual IPs and VRRP IDs. For which EOS version and platform are you looking these values for? For example, on 7280R/7500R you can have 8 VRRP per interface.

Thanks,
Aesha

This would be under consideration for 7050TX and 7280CR2A series on at least the 4.20 tree.

Is there a document available for reference for any models?

(Louis Bolanos at March 28, 2019 10:44 pm)
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Posted by Chris Kane
Answered on March 26, 2019 6:49 pm

Louis,

While you’re working on your response to Aesha’s question about any specific platform, I’m curious about the use case. I’m interested to know where/why several Secondary IP addresses are needed.

Also note that because of faster failover and convergence, we often recommend taking advantage of Virtual ARP (vARP).

-chris

Due to various requirements (ACL/TCAM limitations, subnet size limitations), we need to add additional subnets to a single interface to support wildcard masks.

(Louis Bolanos at March 28, 2019 10:47 pm)

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