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Author Topic: Heartbeat for communication line and routing decision using advance routing lic  (Read 2634 times)

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Offline chandresh67

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I have two Avaya ERS 4548GT-PWR switches on stack configuration with advance routing license.

On the switch, I have Verizon ELAN Mesh Network (Verizon Provider) connection used for route local traffic and VoIP data to six locations plug into port 3 on switch 1. I also have Meraki MX80 firewall used for internet traffic and also provide site to site VPN (Mesh Network) back up/fail over for Verizon ELAN connection

Is there any way to setup heartbeat to monitor Verizon outage on Avaya switch? If yes, is there way to configure L3 switch to route local and VoIP traffic over firewall  and revert back to Verizon after communication line gets restore.

At this time fail over to Meraki works after verizon network cable is remove from the switch.

Any help will be greatly appreciated.

Thank you in advance.

Offline Telair

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If it was simple point-to-point then you could use VLACP to take the port down when the circuit fails.  That won't work for point-to-multipoint though.  The only thing I can think of is to use a routing protocol like RIP or OSPF and have the primary link as the lowest cost route.  If that failed, after a bit the next available route would be the VPN system and data would re-route though there.  When the Verizon link comes back up routing would be re-established and the route path would switch back to that link due to the lower cost.

Offline chandresh67

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Thank you for your reply. I am using OSPF routing protocol on the switch. Unfortunately, I do have Verizon ELAN L2 connection. The physical cable is still plugged into switch. During Verizon ELAN outage happens from Verizon, I do not get any signal on the cable.

Is there any way to monitor drop of signal from L2 connection awhile physical cable connect one side to Verizon ELAN module box and second cable into Avaya L3 switch?

At this time, Avaya is not sending drop of signal from carrier.

If I removed the physical cable, it does fail over to Meraki Point to point VPN and restore connectivity.

Thank you in advance for your reply.

Offline Dominik

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    • Networkautobahn
The feature that your are looking for is Link-state tracking.
The good news is that you can use it to solve your prblem. The bad news is that it is brand new
feature that came out with SW 5.7, so you will only have it available if you update to 5.7.

Link-state tracking
Link-state tracking (LST) binds the link state of multiple interfaces. The Link-state tracking
feature identifies the upstream and downstream interfaces. Interfaces connected to servers
are referred to as downstream interfaces, and interfaces connected to distribution switches
and network devices are referred to as upstream interfaces. In a link-state group, these
interfaces are bundled together and the downstream interfaces are bound to the upstream
For example, in an application, link-state tracking can provide redundancy in the network with
two separate switches or stacks when used with server NIC adapter teaming. If interface 1
goes down on either switch, the server continues to send traffic through interface 2 and the
traffic is dropped. If interfaces 1 and 2 are coupled in a link-state group (as upstream and
downstream ports respectively), when interface 1 is unavailable, interface 2 is disabled
prompting the server to choose the other path as target.
For more information, see Configuring Systems on Avaya Ethernet Routing Switch 4000
Series, NN47205-500.

Good Luck
Itīs always the networks fault!