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Re: multicast: Re: NANOG 25 multicast loss?


Chronological Thread 
  • From: Hans Kuhn <>
  • To: Marshall Eubanks <>
  • Cc: "Lucy E. Lynch" <>, Bill Owens <>, , ,
  • Subject: Re: multicast: Re: NANOG 25 multicast loss?
  • Date: Tue, 11 Jun 2002 07:35:30 -0700 (PDT)
Marshall,

We have a routing loop between two canet routers (nyc and
montreal). I've copied the ontario gigapop contact, Marcos
so he can see some of the receiver reports.

Marcos,

Is there a contact in canet that we can include? I didn't
see an obvious one on www.canet3.com.

Hans

--
Hans Kuhn, Academic User Services office (541) 346-1714
University of Oregon, 237 CC fax (541) 346-4397

Key fingerprint = 1E BC 32 03 AC E9 82 6C 44 4A CD 63 BB 2D 51 89

On Tue, 11 Jun 2002, Marshall Eubanks wrote:

: On Tue, 11 Jun 2002 07:20:59 -0700 (PDT)
: "Lucy E. Lynch"
<>
wrote:
: > Marshall & Bill -
: >
:
: Looking at receiver reports :
:
: To Canaire (MPEG-1)
: There were 302 Separate Records Encountered
:
: Of these 0.993377 Per Cent Had Zero Loss
:
: Average packet loss fraction = 8.12552 per cent
: Maximum packet loss fraction = 16.7969 per cent
: RMS packet loss fraction = 3.04354 per cent
:
: To Here (H261)
:
: There were 733 Separate Records Encountered
:
: Of these 51.4325 Per Cent Had Zero Loss
:
: Average packet loss fraction = 5.96276 per cent
: Maximum packet loss fraction = 94.1406 per cent
: RMS packet loss fraction = 10.3069 per cent
:
: Marshall
:
:
: > 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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