Certain websites over MPLS

Unanswered Question

We currently connect our remote sites over an ISP's hosted MPLS network. Occasionally we run into a website not working and all signs point to the MPLS network. I've seen this problem before with IPSEC VPN tunnels but not across the MPLS connections. Has anyone experienced similar issues?

I have this problem too.
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sankararaman.k Sun, 10/18/2009 - 21:21


You would experience MTU issue more in case of IPSEC VPN since it carries more overhead compare to MPLS VPN. IPSEC overhead is 46bytes while MPLS is 4bytes.

Also requires your ISP to set higher mtu > 1500 size across the path.



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