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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

TalkTalk and DSCP and 19 second latency: Difference between revisions

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autoreview, Bureaucrats, editor, Interface administrators, reviewer, Administrators
12,662 edits
AA-Andrew (talk | contribs)
autoreview, Bureaucrats, editor, Interface administrators, reviewer, Administrators
12,662 edits
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So, seems this is a problem within TalkTalks's UK network, probably affecting all TalkTalk ADSL and VDSL lines in the UK.
So, seems this is a problem within TalkTalks's UK network, probably affecting all TalkTalk ADSL and VDSL lines in the UK.


=Deep Packet Inspection =
=Deep Packet Inspection Concerns=
TalkTalk provide AAISP the routing of PPP packets from our customer's router (CPE) to our routers (LNS).
TalkTalk provide AAISP the routing of PPP packets from our customer's router (CPE) to our routers (LNS).


One concern that this issue raises is that TalkTalk are inspecting further in to the packet than we'd like or need them to. This may well be by mistake (a miss-configured router within TalkTalks network), but this is something we're keen to understand and get to the bottom of.
It is obvious that our ping tests show that TalkTalk are inspecting the DSCP field in the IP packet within the PPP and then applying that DSCP classification when they pass the PPP frame through their network - applying some sort of queuing rule to it.

One concern that this issue raises is that TalkTalk are inspecting further in to the packet than we'd like or need them to. This may well be by mistake (a miss-configured router within TalkTalk's network), but this is something we're keen to understand and get to the bottom of.


=The fix=
=The fix=
Retrieved from "http://support.aa.net.uk/TalkTalk_and_DSCP_and_19_second_latency"