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Author Topic: IP Helper  (Read 10606 times)

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Offline gcloutier

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IP Helper
« on: May 30, 2013, 03:45:43 PM »
We have a stack of 4 4550T-PWR and 1 4548GT-PWR and these are still at the first firmware revision (5.0.1.00) We would like to create a second data vlan. I know that ip helper is the protocol that tell to the DHCP which ip address to give to a computer. I can't seem to see that option in our stack and i'm wondering if in one of the firmware revision this option become available or Nortel had a different way do achieve the same goal in a differrent way?

Thanks in advance.


Offline Johan Witters

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Re: IP Helper
« Reply #1 on: May 30, 2013, 06:01:21 PM »
You are correct with the IP helper, but on Nortel/Avaya switches this mechanism is called DHCP relay.

You can find it in Device manager under IP > DHCP helper or through CLI "ip dhcp-relay fwd-path agent-adres server-address"

agent address: the ip address of the switch in de vlan on which the client resides
server address: ip address of the DHCP server in the other vlan


Kind regards,

Johan Witters

Network Engineer
BKM NV

Offline gcloutier

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Re: IP Helper
« Reply #2 on: May 31, 2013, 08:53:13 AM »
I verified for DHCP helper in the device manager and in the cli for the ip relay and it does not seem to exist. I think my point about the firmware version of our stack might be the reason that we do not have these options. Does someone know at which version these are added?

Offline Johan Witters

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Re: IP Helper
« Reply #3 on: May 31, 2013, 08:55:19 AM »
Not sure, I would have to check the release notes on later releases..

Did you already enable ip routing? I'm not sure, but it might be the relay feature is only available after enabling ip routing.
Kind regards,

Johan Witters

Network Engineer
BKM NV

Offline gcloutier

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Re: IP Helper
« Reply #4 on: May 31, 2013, 10:59:51 AM »
I looked for the ip routing option (I verified in my doc) and I this option does not seem to be there. We have a Data Vlan and a Voice Vlan already configured so I could think that the ip routing is already functional.

Offline yogo

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Re: IP Helper
« Reply #5 on: June 03, 2013, 08:18:07 AM »
if i remember right, the dhcp relay function was implemented with software version 5.2 for the ers45xx series.

Offline Johan Witters

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Re: IP Helper
« Reply #6 on: June 03, 2013, 09:49:26 AM »
Yogo is correct,

release notes for 5.2.0 mention DHCP and BOOTP relay as new features. So if you want to make use of this you'll have to upgrade at least to 5.2.0..

Kind regards,

Johan Witters

Network Engineer
BKM NV

Offline gcloutier

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Re: IP Helper
« Reply #7 on: June 03, 2013, 10:08:50 AM »
Thanks guy for the info. Just a quick question. For what I understand with the 4550t-PWR you need to updgrade the software AND the PoE firmware. So it's a double upgrade each time. Does it need to reboot for both (I would think it does but I'm asking the question just in case)? Does going all the way up to the Avaya firmware is worth it?

Thank in advance, you guiys are really helpful.  :)

Offline Johan Witters

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Re: IP Helper
« Reply #8 on: June 03, 2013, 10:17:14 AM »
Actually you need to upgrade bootloader, diagnostics, agent and PoE firmware...

In most releases you only have an agent version and diagnostics. Always upgrade the diagnostics first as it will enable some hardware features needed for the agent to load in some cases. In most releases you can load the diag without rebooting, load the agent and reboot at the end. If a reboot is necessary after the new diag is loaded, it is mentioned in the release notes.

If you're upgrading the switch, I would take time to upgrade to 6.2 or 6.3 as it has some new features added, and some bugfixing as well...
Kind regards,

Johan Witters

Network Engineer
BKM NV

Offline gcloutier

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Re: IP Helper
« Reply #9 on: June 03, 2013, 11:00:15 AM »
So as I understand what you call the "agent version" is the "Standard runtime image software". Is that correct? I checked every 5.x.0 upgrade I haven't found any "bootloader" for the 4500 serie but it got everytime the diagnostic and the Standard runtime image software. I've seem somethin about a demo license in the Avaya revision. What is this about?

BTW if I did the software before the dianostic, is that a big issue?

Offline yogo

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Re: IP Helper
« Reply #10 on: June 04, 2013, 05:19:33 AM »
usually there is no need to upgrade the bootloader, it's already on your device. same for the poe file.
with the demo license you can try some extra features like OSPF, VRRP and ECMP. it's a 30 days trial license.

it's an avaya recommendation to upgrade diagnostic before the software image. i don't know if it's a big issue if you won't do so, but maybe you'll get in trouble.

Offline gcloutier

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Re: IP Helper
« Reply #11 on: June 04, 2013, 10:34:32 AM »
Ok good, on the next version I'll do the diagnostic before. I only updgraded from 5.0.1 to 5.1 right now. So the upgrade path is 5.1 to 5.2 to 5.3 etc... Can't go directly to the last one right?

Offline Telair

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Re: IP Helper
« Reply #12 on: June 04, 2013, 11:59:14 AM »
Actually you can go directly from your v5.1 code to the latest v5.6 code as long as you first do the diagnostic code update first ( 4500_5303_diag.bin ) and reboot.  Then it will allow you to upgrade the software image code to the latest ( 4000_563024.img ).  Just make sure to read your release notes!
« Last Edit: June 04, 2013, 12:01:30 PM by Telair »

Offline gcloutier

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Re: IP Helper
« Reply #13 on: June 04, 2013, 03:13:08 PM »
So I can go directly to 5.6. I see that with the 5.6.3, there's the diagnostic, the bootloader and the agent code. So I could understand that I need to go fist to the 5.6.0 before moving to the .3

Offline Telair

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Re: IP Helper
« Reply #14 on: June 04, 2013, 03:37:05 PM »
No, you should be able to go directly up to v5.6.3 from your current code.  I don't see anything in the release notes about having to go to v5.6.0 first.  In the 5x00 series switches there are cases of "You have to go to code x before you can upgrade to code y".  But in the 4x00 switches there are no notes to that effect.  In fact, here is the direct notes on upgrading.

Upgrading Agent Image from release 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.6.1, or 5.6.2 to release 5.6.3

1. Upgrade the diagnostic image from the earlier release to release 5.3.0.3 diagnostic image.
2. Upgrade the agent image from release 5.0, 5.1, 5.2, , 5.3, 5.4, 5.5, 5.6, 5.6.1, or 5.6.2 to release 5.6.3 agent image.


So you can go direct to v5.6.3 from any v5.0 code level as long as you upgrade the diagnostic image first to at least v5.3.0.3. 
« Last Edit: June 04, 2013, 08:15:42 PM by Telair »