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May 31st, 2016 07:00
X-Series DHCP Server settings only allow one DNS server?!
Successfully set up our new X4012 switch, including the DHCP server options so that it gives out IP addresses to devices, except for one issue:
Under Network Administration --> DHCP Server --> Edit Network Pool --> Static Host Options
the Domain Name Server field (which the online Help says corresponds to DHCP option 6) only accepts one IP address. All of the specifications I've seen for option 6 (and every other DHCP server I've used) allows multiple IP's. In most systems I've used, they get separated by commas or separate "DNS Server 1," "DNS Server 2" and "DNS Server 3" fields.
I've tried commas, spaces and all sorts of things but the field only accepts a single IP. I also tried to set it via CLI, but the X4012 doesn't seem to allow DHCP configuration via CLI?
Any help would be appreciated. Only accepting one IP eliminates redundancy from a core network service (DNS), not to mention that it makes scheduled (or unscheduled) maintenance on a DNS server into a complication instead of a trivial matter.
Anyone have a solution other than not using the DHCP server feature on the X4012?
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w8ing4u
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November 17th, 2016 06:00
I have to say that this limitation is very annoying. The DNS servers option you mention just helps the switch resolve from multiple servers, which isn't really helpful to this specific problem. Any reason this can't be added in a firmware update?
Matt Gottlieb
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December 11th, 2016 14:00
I agree with previous posters that this is an annoying (and silly) restriction. While X-Series switches may be entry level, they fit well as a branch office layer-3 switch. Branch offices may not have something more robust for a DHCP server, and certainly not a VM environment. It is best practice (and common sense) to configure at least 2 DNS servers for your clients, particularly when running Active Directory.
Multiple DNS servers have been supported in DHCP since time immemorial and I'm sure whatever DHCP service is running on the X-series switch certainly supports it, and this is probably just a limitation in the configuration. This limitation is unfortunately preventing us from deploying the X-series for a client where it would otherwise be a perfect fit. Is there any way to request an improvement?