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LlewellynIT
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3Com 4500 gives error when attempting to assign IP to more than 3 virtual interfaces

I have a 3Com 4500 I am attempting to set up as our primary Layer 3 routing/switching device for internal network traffic. I have run into an issue when attempting to create all of the VLANs I need on the 3Com 4500 : when I'm attempting to create VLAN 10 it gives me the following message:

[4500]interface vlan-interface 10
 There is not enough routing resources available!

Does this mean all this unit can handle is routing between the 3 VLANs I've already assigned IP's to? Or is there a configuration setting that is limiting me right now? I only need ONE more VLAN IP address defined here...
Switches / HubsRoutersNetwork Architecture

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LlewellynIT

8/22/2022 - Mon
giltjr

Which exact 4500 do you have?  What is the firmware version.  Some of the older models/firmware were limited to 4 VLAN, there was a firmware upgrade that increased this to 8.  However when you exceeded the number of VLAN's you actually got a message that stated so.

Do you have a lot of IP routes defined?  Either statically or dynamic routes via RIP?
LlewellynIT

ASKER
Looks like I am on version : V3.03.00s56
No static routes defined - I have RIP setup but it's not working yet.

I see a 3.03.02 version available, I'll update the firmware right now.
LlewellynIT

ASKER
Updated to latest firmware version. Same response when I try to define an IP on the VLAN...

Switch 4500 PWR 50-Port Software Version 3Com OS V3.03.02s56p05
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LlewellynIT

ASKER
Actually I only have 3 IP addresses currently defined, I'm getting the error when attempting to add the 4th.

I have an IP on VLAN 2, VLAN 3, and VLAN 5. Attempting to define an IP on VLAN 10 gives me this error. In fact I just tried removing one of the IP addresses (down to 2) and I still cannot even access the virtual interface in question:

[4500]interface vlan-interface10
 There is not enough routing resources available!
giltjr

So you don't have any IP addresses on physical interfaces?

What I would suggest is removing one of the current VLAN's and VLAN 10.  Add VLAN 10 back and try giving it an IP address and see what happens.

Are you using /24's for all of the subnets?  If not, could you have made a mistake in a subnet mask and you are trying to add an IP address that is in the same subnet as one of the other VLAN's?  (starting to grasp at straws).

LlewellynIT

ASKER
Unfortunately I cannot assign IP addresses to physical interfaces on this device, so that is not an option.

I am using /24 for all my subnets correct. This IP is definitely not on any of the other subnets, in fact I don't even get to that step. As I mentioned previously, I get this error when I attempt to configure the virtual interface at all. I don't even get to the point where I'm defining an IP on the interface since it won't let me.

I just tried removing the entire virtual interfaces as opposed to just the IP's defined on them. Now I can apparently enter VLAN 10 and assign an IP. Thank you for identifying that there was a "limit of 4" on here, it apparently applies to the virtual interfaces PERIOD. Thankfully I only need exactly 4! Thanks so much for the help!
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