05-12-2010 10:08 AM - edited 03-04-2019 08:27 AM
I have 2911Sec9 router with 2 Internet leased lines.
ISP1 (Airtel) 4Mbps connected to ethernet port
ISP2 (STPI) 2Mbps connected to serial port
I have following requirements.
1. Configure load balancing - Send all VoIP traffic using ISP2 (STPI) and rest traffic using ISP2 (Airtel)
2. Configure fail over - In case ISP1 is down, all traffic should be diverted to ISP2 and vise versa
Please help with commands needed to be run for above requirements
Also, let us know whehter both both ISPs bandwidth can be clubbed/aggrigated (4+2=6Mbps).
Thanks in advance!!!
Regards,
Pankaj Parmar
05-13-2010 12:09 AM
Hello Pankaj,
first of all:
>> Also, let us know whehter both both ISPs bandwidth can be clubbed/aggrigated (4+2=6Mbps).
this cannot be done given the different technologies of the interfaces
>>
I have following requirements.
1. Configure load balancing - Send all VoIP traffic using ISP2 (STPI) and rest traffic using ISP2 (Airtel)
2. Configure fail over - In case ISP1 is down, all traffic should be diverted to ISP2 and vise versa
this can be achieved by:
making ISP1 the preferred path for all traffic and using specific static routes or PBR to move VoIP traffic over ISP2 link
example:
ip route 0.0.0.0 0.0.0.0 isp1
ip route 0.0.0.0 0.0.0.0 isp2 201
! this makes isp1 preferred for all traffic
! specific static routes for VOIP traffic
ip route 10.10.10.0 255.255.255.0 isp2
more specific route is used first
this approach is possible if VOIP subnets are dedicated and different from IP subnets used for data
otherwise you need PBR
policy based routing
this allows to divert specific traffic based on traffic type
Edit:
the same ideas apply if you are using BGP or other protocol with ISPs; making ISP1 link preferred using ISP2 link for specific destination or specific traffic.
Hope to help
Giuseppe
05-13-2010 01:03 AM
>> Also, let us know whehter both both ISPs bandwidth can be clubbed/aggrigated (4+2=6Mbps).
this cannot be done given the different technologies of the interfaces
Reply: Will bandwidth aggregation work if my both ISPs are running on ethernet port?
05-13-2010 03:10 AM
Hello Pankaj,
the answer is no again
bandwidth aggregation can be done only when both links are terminated on the same device, if you have two different ISPs they will have two different devices so you cannot use it
Hope to help
Giuseppe
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