Hi Phi DG,
BGP will be involved in the connection with the 2 ISP's, I will be enabling BGP to merge and balance traffic and as a backup to each other. my only concern is the cache/proxy server, since I need to define the cache_peer parents for each of 2 ISP's my question is, can squid knows that it has 2 ISP links and it should merge load balance the traffic (for example ISP 1 is 1 Mbps and ISP 2 is 1 Mbps) so can squid knows that the total bandwidth is 2 Mbps? second, If ISP 1 fails all traffic is redirected to ISP 2 automatically by BGP, so squid should also fetch object to ISP 2 with 1 Mbps bandwidth.
I short can we configure squid to follow the routing activity? the router ang BGP routing will do the layer 1 to layer 4, and squid cache will ride on it?
Thank you very much,
Wennie
----- Original Message ----- From: "Damian-Grint Philip" <pdamian-grint@xxxxxxxxxxxxxxxxx>
To: "Wennie V. Lagmay" <wlagmay@xxxxxxxxxxxxx>; <squid-users@xxxxxxxxxxxxxxx>
Cc: "squidrunner team" <squidrunner_dev@xxxxxxxxx>
Sent: Saturday, May 21, 2005 8:07 PM
Subject: RE: [squid-users] Multiple ISP setup
Hi Wennie,
I may be getting the wrong end of the stick here, but It sounds like you are asking how to load-balance traffic to and from a single host (squid box) over two links that you only control on the near end, without touching the routers involved.... that's quite a challenge.
One approach which has worked very well for me in the past is to use at least two squid boxes, each associated to an address that is preferred on separate links. You can then split your traffic across the two links by splitting your traffic across the two squid boxes.
You could do this for proxy-configured clients by using a WPAD proxy script which returns different PROXY strings based on the ip address of the client, and for non-proxy-configured clients, by letting WCCP split the load (by destination address hashes I think) as long as both squid boxes register with the same intercepting router.
If you can involve your BGP config engineer, then you will have more options - you can't talk about load balancing and redundancy without involving routing anyway - you split the inbound traffic from the outbound traffic and then talk about how you can influence the paths taken in each case.
Regards
Phi DG
-----Original Message----- From: Wennie V. Lagmay [mailto:wlagmay@xxxxxxxxxxxxx]
Sent: Sat 21/05/2005 07:24
To: squid-users@xxxxxxxxxxxxxxx
Cc: squidrunner team
Subject: [squid-users] Multiple ISP setup
How can I setup my squid to automatically connect and load balance from two
or more ISP at the same time? Presently we are connected to ISP 1 so all
clients are served by our proxy server through ISP 1, now we are about to
have ISP 2 my question now is how can I configure my squid to use both ISP
at the same time, when ISP 1 is down all request will be on ISP 2 and vice
versa?
The routing will be handle by our router configure for BGP, so my only concern is about squid.
Thank you very much,
Wennie
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