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TalkTalk and DSCP and 19 second latency: Difference between revisions
TalkTalk and DSCP and 19 second latency (view source)
Revision as of 19:57, 7 December 2021
, 7 December 2021→The cause
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This only goes up to just under 2 seconds, but if left, it will peak at 19 seconds:
1408 bytes from 81.187.81.187: icmp_seq=986 ttl=63 time=19084.589 ms
=== pcaps ===
We were able to perform pcaps on the customer router (a FB2900) and the LNS. and were able to tell which direction the latency applied. The timestamps show the following:
'''Ping request'''
Leaves CPE: 12:03:38.495103
Arrives LNS 12:03:37.438478
'''Ping reply'''
Leaves LNS 12:03:38.505869
Arrives CPE 12:03:38.495106
In this example, it takes nearly 1 second for the packet to travel from the CPE to our LNS. The reply (from LNS to CPE) is quick.
=== What's DSCP and CS6? ===
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