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Re: multicast: Re: NANOG 25 multicast loss?


Chronological Thread 
  • From: "Lucy E. Lynch" <>
  • To: Marshall Eubanks <>
  • Cc: Bill Owens <>, <>, <>
  • Subject: Re: multicast: Re: NANOG 25 multicast loss?
  • Date: Tue, 11 Jun 2002 07:20:59 -0700 (PDT)
Marshall & Bill -

This seems to be consistant with what I'm seeing (NY-CA bad,
abilene/west via chicago better). Thanks -

Lucy E. Lynch Academic User Services
Computing Center University of Oregon

(541) 346-1774/Cell: 912-7998

On Tue, 11 Jun 2002, Marshall Eubanks wrote:

> On Tue, 11 Jun 2002 06:50:01 -0700 (PDT)
> "Lucy E. Lynch"
> <>
> wrote:
> > Bill -
> >
> Lucy;
>
> Here is what I've got from here. Note I can mtrace to the H.261 but not
> to the MPEG-1 (?).
>
> Marshall
>
> multicasttech-1>show ip mbgp 192.35.169.6
> BGP routing table entry for 192.35.169.0/24, version 3234470
> Paths: (3 available, best #1)
> Advertised to non peer-group peers:
> 63.251.101.52
> 15076 1239 11537 6509 549 236
> 216.177.55.5 from 216.177.55.5 (216.177.32.254)
> Origin IGP, localpref 100, weight 500, valid, external, best
> 1239 11537 6509 549 236
> 160.81.38.225 from 160.81.38.225 (144.228.242.54)
> Origin IGP, metric 117, localpref 100, valid, external
> 145 6509 549 236
> 166.61.8.89 from 166.61.8.89 (204.147.128.136)
> Origin IGP, localpref 100, valid, external
> Community: 9503719 426573835 426573924 426574373
> multicasttech-1>
>
>
> Group: 224.2.129.33, NANOG 25 (H.261)
> Source: 192.35.169.6 (?)
> Rate: 6 pps/63 kbps(1sec), 57 kbps(last 21 secs), 59 kbps(life avg)
>
> multicasttech-1>mtrace
> Source address or name: 192.35.169.6
> Destination address or name: 63.105.122.133
> Group address or name: 224.2.129.33,
> Multicast request TTL [64]:
> Response address for mtrace:
> Type escape sequence to abort.
> Mtrace from 192.35.169.6 to 63.105.122.133 via RPF
> >From source (?) to destination (off-mct2.multicasttech.com)
> Querying full reverse path...
> 0 off-mct2.multicasttech.com (63.105.122.133)
> -1 off-mct2.multicasttech.com (63.105.122.133) PIM/MBGP [192.35.169.0/24]
> -2 216.177.55.5 PIM/MBGP [192.35.169.0/24]
> -3 208.1.115.206 [AS 1239] PIM [default]
> -4 63.173.24.173 [AS 1239] PIM/MBGP [192.35.169.0/24]
> -5 sl-bb22-rly-15-2.sprintlink.net (144.232.20.37) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -6 sl-bb23-rly-12-0.sprintlink.net (144.232.14.138) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -7 sl-bb25-sj-5-3.sprintlink.net (144.232.20.57) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -8 sl-bb21-stk-10-2.sprintlink.net (144.232.9.170) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -9 sl-bb22-stk-15-0.sprintlink.net (144.232.4.242) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -10 sl-w1-mae-1-0-0.sprintlink.net (144.232.8.1) [AS 1239] PIM/MBGP
> [192.35.169.0/24]
> -11 198.9.201.205 [AS 24] PIM/MBGP [192.35.169.0/24]
> -12 198.32.8.73 [AS 11537] PIM/MBGP [192.35.169.0/24]
> -13 dnvr-snva.abilene.ucaid.edu (198.32.8.2) [AS 11537] PIM/MBGP
> [192.35.169.0/24]
> -14 kscy-dnvr.abilene.ucaid.edu (198.32.8.14) [AS 11537] PIM/MBGP
> [192.35.169.0/24]
> -15 ipls-kscy.abilene.ucaid.edu (198.32.8.6) [AS 11537] PIM/MBGP
> [192.35.169.0/24]
> -16 c3-chicor01.canet3.net (205.189.32.98) [AS 6509] PIM/MBGP
> [192.35.169.0/24]
> -17 c3-torcor01.canet3.net (205.189.32.146) [AS 6509] PIM/MBGP
> [192.35.169.0/24]
> -18 c3-ontgig01.canet3.net (205.189.32.209) [AS 6509] PIM/MBGP
> [192.35.169.0/24]
> -19 tor-gigapop.onet.on.ca (205.211.94.234) [AS 549] PIM/MBGP
> [192.35.169.0/24]
> -20 206.248.63.2 PIM [192.35.169.0/25]
> -21 192.35.169.6
> multicasttech-1>
>
>
> Group: 224.2.184.125, NANOG 25 (MPEG-1)
> Source: 192.35.169.6 (?)
> Rate: 17 pps/176 kbps(1sec), 186 kbps(last 31 secs), 160 kbps(life avg)
>
>
>
> multicasttech-1>trace 192.35.169.6
>
> Type escape sequence to abort.
> Tracing the route to 192.35.169.6
>
> 1 216.177.55.5 0 msec 4 msec 0 msec
> 2 208.1.115.206 [AS 1239] 4 msec 0 msec 4 msec
> 3 63.173.24.173 [AS 1239] 4 msec 0 msec 0 msec
> 4 sl-bb22-rly-15-2.sprintlink.net (144.232.20.37) [AS 1239] 4 msec 4 msec
> 4
> msec
> 5 POS1-2.BR4.DCA6.ALTER.NET (204.255.169.129) [AS 701] 4 msec 4 msec 4
> msec
> 6 0.so-1-0-0.XL1.DCA6.ALTER.NET (152.63.41.230) [AS 701] 4 msec 4 msec 4
> msec
> 7 0.so-0-0-0.TL1.DCA6.ALTER.NET (152.63.38.69) [AS 701] 4 msec 4 msec 8
> msec
> 8 0.so-7-0-0.TL1.TOR2.ALTER.NET (152.63.2.93) [AS 701] 24 msec 20 msec 20
> msec
> 9 POS1-0.XR1.TOR2.ALTER.NET (152.63.2.110) [AS 701] 20 msec 24 msec 20
> msec
> 10 POS6-0.GW4.TOR2.ALTER.NET (152.63.131.137) [AS 701] 20 msec 24 msec 20
> msec
> 11 grouptel23-t-gw.customer.alter.net (157.130.159.254) [AS 701] 32 msec 32
> msec 36 msec
> 12 GE5-0.PEERA-TOROON.IP.GROUPTELECOM.NET (66.59.191.21) [AS 6539] 32 msec
> 32
> msec 32 msec
> 13 ATM2-0.NANOG25.IP.GROUPTELECOM.NET (216.18.62.102) [AS 6539] 36 msec 36
> msec
> 36 msec
> 14 192.35.169.6 [AS 236] 36 msec 36 msec 32 msec
> multicasttech-1>mtrace
> Source address or name: 192.35.169.6
> Destination address or name: 63.105.122.133
> Group address or name: 224.2.184.125
> Multicast request TTL [64]:
> Response address for mtrace: 63.105.133.122
> Type escape sequence to abort.
> Mtrace from 192.35.169.6 to 63.105.122.133 via group 224.2.184.125
> >From source (?) to destination (off-mct2.multicasttech.com)
> Querying full reverse path... * switching to hop-by-hop:
> 0 off-mct2.multicasttech.com (63.105.122.133)
> -1 * * * Timed out receiving responses
> Perhaps no local router has a route for source, the receiver is not
> a member of the multicast group or the multicast ttl is too low.
>
> multicasttech-1>
>
>
> > We'e seeing some oddities in multicast routing (inbound announcements)
> > can you send an mtrace?
> >
> > Lucy E. Lynch Academic User Services
> > Computing Center University of Oregon
> >
> > (541) 346-1774/Cell: 912-7998
> >
> > see:
> >
> > Mtrace from 128.223.214.24 to 192.35.169.7 via group 224.2.246.13
> > Querying full reverse path... * switching to hop-by-hop:
> > 0 ? (192.35.169.7)
> > -1 ? (192.35.169.1) PIM/BGP4+ thresh^ 0
> > -2 tor-gigapop.onet.on.ca (206.248.63.1) PIM/BGP4+ thresh^ 0
> > -3 tor-c3-gsr.onet.on.ca (205.211.94.233) PIM/BGP4+ thresh^ 0
> > -4 c3-torcor01.canet3.net (205.189.32.210) PIM/BGP4+ thresh^ 0
> > -5 c3-ottcor01.canet3.net (205.189.32.150) PIM/BGP4+ thresh^ 0
> > -6 c3-moncor01.canet3.net (205.189.32.154) PIM/BGP4+ thresh^ 0
> > -7 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -8 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -9 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -10 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -11 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -12 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -13 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -14 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -15 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -16 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -17 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -18 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -19 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -20 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -21 * * c3-nyccor01.canet3.net (205.189.32.178) PIM thresh^ 1 RPF
> > Interface
> > -22 c3-moncor01.canet3.net (205.189.32.177) PIM/BGP4+ thresh^ 0
> > -23 Mtrace from 192.35.169.6 to 205.189.32.177 via group 224.2.246.93
> > Querying full reverse path...
> > 0 c3-moncor01.canet3.net (205.189.32.177)
> > -1 c3-moncor01.canet3.net (205.189.32.154) PIM/BGP4+ thresh^ 0
> > Reached RP/Core
> > -2 c3-ottcor01.canet3.net (205.189.32.153) PIM/BGP4+ thresh^ 0
> > Reached RP/Core
> > -3 c3-torcor01.canet3.net (205.189.32.149) PIM/BGP4+ thresh^ 0
> > Reached RP/Core
> > -4 c3-ontgig01.canet3.net (205.189.32.209) PIM/BGP4+ thresh^ 0
> > Reached RP/Core
> > -5 tor-gigapop.onet.on.ca (205.211.94.234) PIM/BGP4+ thresh^ 0
> > -6 ? (206.248.63.2) PIM thresh^ 0
> > -7 ? (192.35.169.6)
> > Round trip time 14 ms; total ttl of 6 required.
> >
> > Waiting to accumulate statistics...Results after 9 seconds:
> >
> > Source Response Dest Overall Packet Statistics For Traffic
> > From
> > 192.35.169.6 192.35.169.7 Packet 192.35.169.6 To 224.2.246.93
> > v __/ rtt 14 ms Rate Lost/Sent = Pct Rate
> > 192.35.169.1
> > 206.248.63.2 ?
> > v ^ ttl 2 142 pps 0/145 = 0% 16 pps
> > 206.248.63.1
> > 205.211.94.234 tor-gigapop.onet.on.ca
> > v ^ ttl 3 307 pps -7/145 = -4% 16 pps
> > 205.211.94.233
> > 205.189.32.209 c3-ontgig01.canet3.net Reached RP/Core
> > v ^ ttl 4 316 pps 1/152 = 0% 16 pps
> > 205.189.32.210
> > 205.189.32.149 c3-torcor01.canet3.net Reached RP/Core
> > v ^ ttl 5 573 pps -1/151 = 0% 16 pps
> > 205.189.32.150
> > 205.189.32.153 c3-ottcor01.canet3.net Reached RP/Core
> > v ^ ttl 6 720 pps 0/152 = 0% 16 pps
> > 205.189.32.154 c3-moncor01.canet3.net Reached RP/Core
> > v \__ ttl 7 1059 pps ?/152 16 pps
> > 205.189.32.177 192.35.169.7
> > Receiver Query Source
> >
> > Mtrace from 192.35.169.6 to 205.189.32.178 via group 224.2.246.93
> > Querying full reverse path... * switching to hop-by-hop:
> > 0 c3-nyccor01.canet3.net (205.189.32.178)
> > -1 * * *
> > -2 * * *
> > -3 * * *
> > -4 * * * ...giving up
> > Timed out receiving responses
> >
> >
> > On Tue, 11 Jun 2002, Bill Owens wrote:
> >
> > > Is anyone else seeing it? We have considerable loss on all four
> > > streams (video and audio), worst on the MPEG-1 video.
> > >
> > > Bill.
> > >
> >
>


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