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rajan1079 asked on

Auto failover

Hi,
 
I have a juniper j2320 router with one service provider ABC on a serial port.Serial is configured with 10.72.15.1. Ethernet gig0/0 of this router is connected to my switch.This ethernet is configured with 10.72.4.0/24 subnet.

I have another service provider XYZ . This ISP has provided me a Maipu router which has two ethernet ports.One One ethrnet port has the ISP MPLS link on it .IP address on this ethernet is 10.225.162.173.The other ethernet has my lan pool 10.72.4.0/24 configured on it.

When my isp ABC link goes down. I remove the  Juniper router ethernet gig0/0 cable and put it in my ISP XYZ's other ethernet port.

How do i make this failover automatic as currently i have to perform this manual shift?
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arnold

8/22/2022 - Mon
surbabu140977

In Cisco we have "ip sla" command for this. I am sure Juniper would also have something similar. I am not a Juniper guy so cannot comment on the solution.

Best,
arnold

You could interconnect the two routers.
When ABC goes down, does the interface go down as well?
usually you would need a block of your own IPs, and have a BGP peering session with Each provider?
This way when the BGP session drops to one provider, the routing will converge to the remaining provider.

Scripting wise, a connection into the router and then testing a connection out through that interface and either changing the routing table to route through the other provider.
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ASKER
rajan1079

Hi,

When ABC goes down the serial port goes down.

Link on Juniper is a 64 kbps link point to point link to my service provider...this link  connects to the channelised E1 at my central office.....MPLS link on the other router is a separate 256 Kbps link which connectes to my MPLS servicer provider's PE router.Both this links64 kbps and 256 kbps help me to connect to my servers located in the  DATA-CENTRE....

Any clarifications...please reply
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arnold

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ASKER
rajan1079

As per your plan...on juniper one default route will be

0.0.0.0 0.0.0.0 serial-0

and other default route will be

0.0.0.0 0.0.0.0 gig 0

I will terminate the LAN on gig 1

If this is the case why do we need the MAIPU router???

Also, r u sure load balancing will work  as one is a 64 K point to point link and the other is a 256 k MPLS link .????
arnold

It depends on the provider and the reason for maipu router.
I.e. the drop is one that the juniper does not support.

If you can terminate each provider on the juniper with appropriate configuration/settings, you should do that.  This way when the provider connection drops depending on the type, the juniper interface might also go down simplifying the transitions.

Other than a slowdown in performance as long as a path to the outside exists the failover should function.
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ASKER
rajan1079

i think juniper will support....coz in maipu its  a fast ethernet port with port settings to auto.....but with one serial on juniper and the other link on gigethernet will the failover work??????
arnold

If you have access into maipu router, login and see the configuration.
Check with the provider on switching to using your router.

The Ethernet port might not go down when the provider/connection does, you would need to setup a check to detect the Ethernet failure.
ASKER
rajan1079

i wont need the maipu router if the maipu link comes up in juniper???? rite???

pls comment if with one serial on juniper and the other link on gigethernet will the failover work and load balance work???

any docs or real scenarios of  such cases????
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ASKER
rajan1079

i will check mpls link on junos  first...still need clarity on failover and load balance....
ASKER
rajan1079

MPLS link working fine on Juniper...

Current scene....Leased line on serial interface and MPLS link on gigabit ethernet port....how do i achieve autofailover and load balancing?
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