02-25-2009 01:05 PM - edited 03-06-2019 04:15 AM
Hello Experts,
I am trying to use two DSL ISPs to share my VOIP traffic of about 19 SIP phones using G711. I am thinking about using one 2811 router with three Fa interfaces. One interface will go to ISPA, second will go to ISPB and third will go to LAN.
As per my thought process, use two LANs and direct half the traffic through ISPA and half through ISPB. Do I have to use PBR for doing this. If yes, any suggestion or working configuration.
Thanks
OJ
02-25-2009 01:09 PM
I would use route-map for this setup. An ACL will go along with each subnet.
rgds,
02-25-2009 01:15 PM
Thanks... but I have a confusion.
How could I configure the default route? can I specify this?
ip route 0.0.0.0 0.0.0.0 xx.xx.xx.xxx
ip route 0.0.0.0 0.0.0.0 yy.yy.yy.yyy
OJ
02-25-2009 02:46 PM
Could anyone please help?
02-25-2009 02:57 PM
Are your ISPs providing IP space for you? Or are you advertising to them via BGP?
02-25-2009 02:58 PM
No BGP. just one static IP address per connection from the ISP. My ISP doesn't support for small customers.
02-25-2009 03:20 PM
I apologized for I misread your posting. But please take a look at this link as I hope it might be able to help or at least give you something to work with.
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a00808d2b72.shtml
I was also thinking of using two VLANs so that the policy is based on different source addresses. If source is x route to ISPA and if source is y route to ISPB
02-26-2009 02:48 PM
I did as per the document but have an issue. I don't have a default router pointing to two different IP address.
I have attached the config from my test router.
Sh run
sh ip sla statistics
sh ip nat translation
sh ip route
sh ip int brief
sh flash
Any help on this would be very much appreciated.
Thanks
OJ
02-27-2009 05:11 AM
Hi Bansal,
It might not be related but your internal interface is showing up/down.
02-27-2009 05:50 AM
gentlemans,
I guess we are taking about load balancing and not redudancy.
Which means we need to send traffic on both the inteface connected to ISP. Sharing the load.
Redudant which means if one ISP fails traffic shift to othe one. If this is the case thats the above all comments are right.
This can be done using SLA also
02-27-2009 07:04 AM
You are absolutely right. The purpose here is load-balancing and not redundancy. As per the document on Cisco, I should have default route pointed towards two next hop IP addresses. In my case this is not happening.
Any ideas?
OJ
02-27-2009 07:03 AM
that is because I don't have it plugged into anything. This is a test scenario and I am wondering why I don't have two gateways for default router?
Any idea?
OJ
02-27-2009 12:33 PM
could someone please help me with this issue. does anyone have idea on how to do policy based routing with two Vlans. example:
if request comes from Vlan 1 use this gateway and if request comes from Vlan 2 use the other gateway.
Much appreciated.
OJ
02-27-2009 12:47 PM
Could you try this:
ip access-list standard vlan1
permit ip 10.1.1.0 0.0.0.255 any
ip access-list standard vlan2
permit ip 10.1.2.0 0.0.0.255 any
route-map vlan1 permit 10
match address vlan1
set ip nexthop ISP1
route-map vlan2 permit 10
match address vlan2
set ip nexthop ISP2
Or you could just use
ip route 0.0.0.0 0.0.0.0 ISP2 for the other traffic
02-27-2009 01:40 PM
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