nanog mailing list archives
Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton))
From: Randy Bush <randy () psg com>
Date: Sat, 28 Jan 2012 11:02:14 +0900
when a line card is designed to buffer the b*d of a trans-pac 40g, the oddities on an intra-pop link have been observed to spike to multiple seconds.Please turn that buffer down.
not my router. research probes seeing fun anomalies around the global network.
cribbing from a previous ob where I rolled it out network wide: policy-map atm-queueing-out class class-default fair-queue random-detect random-detect precedence 0 10 40 10 random-detect precedence 1 13 40 10 random-detect precedence 2 16 40 10 random-detect precedence 3 19 40 10 random-detect precedence 4 22 40 10 random-detect precedence 5 25 40 10 random-detect precedence 6 28 40 10 random-detect precedence 7 31 40 10 int atm1/0.1 pvc 1/105 vbr-nrt 6000 5000 600 tx-ring-limit 4 service-policy output atm-queueing-out Those packet thresholds were computed as the best balance for 6-20MMbps PVC's on an ATM interface.
while i hope few folk other than telephants still have atm <g>, thanks for posting running code. one problem is that we do not have good tools to look at a link and suggest parms. how did you derive those? randy
Current thread:
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton), (continued)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) bas (Jan 27)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) Joel jaeggli (Jan 27)
- RE: 10GE TOR port buffers (was Re: 10G switch recommendaton) George Bonser (Jan 27)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) Joel jaeggli (Jan 27)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) bas (Jan 27)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) Joel jaeggli (Jan 27)
- pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Randy Bush (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Leo Bicknell (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Randy Bush (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Leo Bicknell (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Randy Bush (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Leo Bicknell (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Leo Bicknell (Jan 27)
- RE: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) George Bonser (Jan 27)
- Re: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Jared Mauch (Jan 29)
- RE: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) George Bonser (Jan 29)
- RE: pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) George Bonser (Jan 29)
- BDP discussion pointers: was: Re pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Jim Gettys (Jan 28)
- Re: BDP discussion pointers: was: Re pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton)) Jim Gettys (Jan 28)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) Leo Bicknell (Jan 27)
- Re: 10GE TOR port buffers (was Re: 10G switch recommendaton) Ćukasz Bromirski (Jan 27)