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VPN Tunnel bandwidth

lrector
Level 1
Level 1

‎07-02-2003 08:45 AM - edited ‎02-21-2020 12:38 PM

I have remote 827 routers connected via ADSL, connecting to 3015 concentrator, using IPSEC vpn tunnels. I am seeing my tunnel bandwidth always less than 400k. Can someone tell me what is the limiting factors here, and is there someway to increase this bandwidth inside the tunnel????

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mostiguy
Level 6
Level 6

‎07-02-2003 11:32 AM

What speeds are your ADSL lines? ADSL, being asymmetric, often only offers 128 to 384k upstream.

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lrector
Level 1
Level 1
In response to mostiguy

‎07-02-2003 12:36 PM

I have most of my sites with BellSouth. They provide me 1.5m down, and 256 upstream.. I have tested from pc on the lan behind the 827, in the download direction, and am only seeing usually about 300k... and I am seeing the same result from about 5 different sites..

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travis-dennis_2
Level 7
Level 7
In response to lrector

‎07-04-2003 07:03 AM

While there is some bandwidth overhead associated with encapsulation I would say the culprit is probably Bellsouth. Check your SLA with them. I bet that you will find that it states speeds "up to" 1.5M down and 256 up. You can also try a bandwidth test w/o the VPN tunnel as an A/B comparison.

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