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Using redundant dhcpds

I'm getting ready to roll out a second dhcpd server with failover operational:

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It's simple enough to set up but since I'm currently supporting multiple subnets from the one server I am not clear about the ip helper-address in IOS. Currently of course it's just the one line ip helper-address 1.2.3.4

Should I add a second helper-address line to the config, or is it better to change the existing line to a broadcast address (1.2.3.255, assuming a /24)? Has anyone used this in production?

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S. Checker
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You should add a second helper-address line.

Steinar Haug, Nethelp consulting, snipped-for-privacy@nethelp.no

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Steinar Haug

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