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HP switch routing

Posted on 2014-02-24
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Last Modified: 2014-02-25
I have a four (4) node HP A5120 IRF stack with multiple VLAN's. Currently I have VLAN 2 setup with interface 192.168.200.254 255.255.255.0. My stack default route is 10.0.0.2 (0.0.0.0 0.0.0.0 10.0.0.2) which is a router outside my stack. My VLAN 1 interface is 10.0.0.1 255.240.0.0. (dont ask about the huge subnet. ;-) )

I am having a SIP trunk installed and we need to also install a border gateway for the SIP. I need to change the default route for all VLAN 2 to point to a the new router that will be hosting my new SIP trunks. Lets say 192.168.200.1. This will be directly connected to the switch.

Can I change my VLAN 2 interface as follows:
192.168.200.254 / 255.255.255.255
and then add a static route of:
192.168.200.0 255.255.255.0 192.168.200.1

I would also need to change my phone DHCP to reflect this assignment, but that should be no problem.

Is this a reasonable assumption?
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Question by:Heritage02Rider
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TimotiSt earned 500 total points
ID: 39883872
I don't think that will work: the 192.168.200.254/32 would leave 192.168.200.1 as not connected, so it either wouldn't take the static route, or take it as an indirect route and try to go through the default gw 10.0.0.2 to reach it.

Can't you just push down 192.168.200.1 as the gw to the devices on vlan2, without doing anything with the switch? Where are your voip devices located and what do they need access to?

Tamas
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Author Comment

by:Heritage02Rider
ID: 39885431
You know, I think you are correct. I will try that. They are coming in for testing today. I will try just changing the DHCP to point to the 192.168.200.1 once it is integrated. Thats a good call. Will let you know if I am successful.
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Author Comment

by:Heritage02Rider
ID: 39885675
OK - prior to the phone guys coming is I tested the following:

Added router with IP address 192.168,200.1 255.255.255.0
Added to port on switch w/untagged membership to VLAN 2 and PVID of VLAN 2
Setup my laptop with fixed IP address 192.168.200.9 and default route of 192.168.200.1

The router can ping the phone system and all other devices on the 192.168.200.0 /24 network except the laptop @ .9. The laptop cannot ping anything. I believe this is due to the fact that the laptop is defaulting to VLAN 1 as untagged membership and now there is no way to get to the VLAN 2 without some kind of route.

Now I am not sure this is a big problem yet as the phones will auto jump to VLAN 2.

So, now still testing, I changed one phone to static IP 192.168.200.8 w/gw 192.168.200.1 and it fired up from the switch and I can ping it from the router.

Finally I changed my laptop back to default DHCP and it received a 10.x.x.x IP address with default route. I could not get a reply back from the router or phone.

So I added "ip route 0.0.0.0 0.0.0.0 192.168.200.254" (the VLAN 2 interface on the switch) and I was then able to ping the router and the phone.

Thank you for the insight. It is much appreciated.
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Author Closing Comment

by:Heritage02Rider
ID: 39885677
Thanks again for the second set of eyes and your insight.
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