We have 3 internet links connected to 1 internet switch > palo alto > Alcatel 6900 > lan network.
When the internet link goes down for some reason the dhcp relay of all Alcatel goes down and the pcs are without assigning ip.
We use a dhcp server and all border routers use dhcp relay.
To solve this problem we have to restart one by one and so mele comes back.
What can it be ?
Dhcp Relay - Alcatel 6860
Dhcp Relay - Alcatel 6860
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Gleylancer
- Member
- Posts: 164
- Joined: 08 May 2013 03:14
Re: Dhcp Relay - Alcatel 6860
Your problem description is waaaay too vague.
Which VLANS connect what? Who is the relay agent? Who is the DHCP Server? Which networks are connected to which servers?
...I could think of plenty more questions.
Which VLANS connect what? Who is the relay agent? Who is the DHCP Server? Which networks are connected to which servers?
...I could think of plenty more questions.
Re: Dhcp Relay - Alcatel 6860
Good morning, I will try to explain in a clearer and more objective way.
We have a dhcp server connected to the lan network, the alcatel are configured to get a relay from this server.
Ex: In one unit we have a fiber link connected to the alcatel that distributes dhcp on the lan network.
When this fiber breaks and then it is fixed, the pcs do not get the ip, only if you restart the dhcp relay service or restart the alcatel.
I do not know if i was clear.
We have a dhcp server connected to the lan network, the alcatel are configured to get a relay from this server.
Ex: In one unit we have a fiber link connected to the alcatel that distributes dhcp on the lan network.
When this fiber breaks and then it is fixed, the pcs do not get the ip, only if you restart the dhcp relay service or restart the alcatel.
I do not know if i was clear.
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Gleylancer
- Member
- Posts: 164
- Joined: 08 May 2013 03:14
Re: Dhcp Relay - Alcatel 6860
Well, there's still no word about VLANs or IP Address ranges. Relay only makes sense when there is multiple of those.
With an issue like this, it's worth using a sniffer and analyzing the traffic going in and out of the interfaces of the client and server.
Personal network design recommendation:
The switch only acts as a relay agent, which in itself is unlikely to be an issue here. But either way, you should think about moving relay agents to the firewall instead. In a basic network, there is only one firewall or a cluster of firewalls which make one single definitive relay agent. With multiple switches you might end up configuring agents on all of them, doubling, tripling the broadcast packets without any purpose. "Who was the relay agent switch again? Ah well, lets configure it on all of them".
With an issue like this, it's worth using a sniffer and analyzing the traffic going in and out of the interfaces of the client and server.
Personal network design recommendation:
The switch only acts as a relay agent, which in itself is unlikely to be an issue here. But either way, you should think about moving relay agents to the firewall instead. In a basic network, there is only one firewall or a cluster of firewalls which make one single definitive relay agent. With multiple switches you might end up configuring agents on all of them, doubling, tripling the broadcast packets without any purpose. "Who was the relay agent switch again? Ah well, lets configure it on all of them".
