Something wrong tonight?

[psp83]

Is there something wrong tonight?

Tracing route to www.bbc.net.uk [212.58.253.75]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.0.1
  2   130 ms   134 ms   140 ms  telehouse-gw2-lo2.idnet.net [212.69.63.55]
  3   131 ms   134 ms   135 ms  telehouse-gw3-g0-1-400.idnet.net [212.69.63.243]

  4     *      129 ms     *     rt-lonap-a.thdo.bbc.co.uk [193.203.5.90]
  5     *      130 ms   131 ms  212.58.238.129
  6   132 ms     *      133 ms  te12-1.hsw0.cwwtf.bbc.co.uk [212.58.239.222]
  7     *        *        *     Request timed out.
  8   132 ms     *        *     www6.cwwtf.bbc.co.uk [212.58.253.75]
  9   130 ms   135 ms   132 ms  www6.cwwtf.bbc.co.uk [212.58.253.75]

Trace complete.

Finding it hard to do anything.

[Aaron]

Had some very high pings on irc and wow just briefly, couldn't do much and eventually disconnected, seems ok now

[Cookiemonster]

Tracing route to www.bbc.net.uk [212.58.253.74]
over a maximum of 30 hops:

  1     1 ms     1 ms    <1 ms   [192.168.0.1]
  2    55 ms    26 ms    26 ms  telehouse-gw2-lo1.idnet.net [212.69.63.51]
  3    25 ms    25 ms    32 ms  telehouse-gw3-g0-1-400.idnet.net [212.69.63.243]

  4    27 ms    31 ms    27 ms  rt-lonap-a.thdo.bbc.co.uk [193.203.5.90]
  5    27 ms    27 ms    26 ms  212.58.238.129
  6    28 ms    28 ms    28 ms  te12-1.hsw0.cwwtf.bbc.co.uk [212.58.239.222]
  7    27 ms    28 ms    28 ms  www5.cwwtf.bbc.co.uk [212.58.253.74]

Trace complete.

Everything ok my side.

[Philip]

I found webpages slow to load earlier on, seems to be getting better now though

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>tracert www.bbc.co.uk

Tracing route to www.bbc.net.uk [212.58.251.206]
over a maximum of 30 hops:

  1    17 ms    <1 ms    <1 ms  192.168.2.1
  2    31 ms    38 ms    31 ms  telehouse-gw2-lo2.idnet.net [212.69.63.55]
  3    30 ms    31 ms    42 ms  telehouse-gw3-g0-1-400.idnet.net [212.69.63.243]

  4   226 ms   223 ms   115 ms  rt-lonap-a.thdo.bbc.co.uk [193.203.5.90]
  5    30 ms    36 ms    30 ms  212.58.238.153
  6    32 ms    32 ms    36 ms  212.58.239.62
  7    32 ms    32 ms    31 ms  www4.telhc.bbc.co.uk [212.58.251.206]

Trace complete.

C:\Documents and Settings\Administrator>

[psp83]

Seems to be fine now, can actually find games on my xbox 360 and not "find game, load... lockup.. alot of swearing.. gives up" 

Tracing route to www.bbc.net.uk [212.58.251.206]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.0.1
  2    49 ms    14 ms    79 ms  telehouse-gw2-lo2.idnet.net [212.69.63.55]
  3    15 ms    15 ms    16 ms  telehouse-gw3-g0-1-400.idnet.net [212.69.63.243]

  4    15 ms    15 ms    14 ms  rt-lonap-a.thdo.bbc.co.uk [193.203.5.90]
  5    14 ms    15 ms    15 ms  212.58.238.153
  6    15 ms    15 ms    19 ms  212.58.239.62
  7    15 ms    17 ms    16 ms  www4.telhc.bbc.co.uk [212.58.251.206]

Trace complete.

[Ted]

mine doesn't look quite right!
[ted@localhost ~]$ su
Password:
[root@localhost ted]# traceroute 212.58.253.75
traceroute to 212.58.253.75 (212.58.253.75), 30 hops max, 38 byte packets
1  home (192.168.1.254)  2.107 ms  1.521 ms  1.499 ms
2  telehouse-gw2-lo1.idnet.net (212.69.63.51)  67.162 ms  54.808 ms  50.906 ms
3  telehouse-gw3-g0-1-400.idnet.net (212.69.63.243)  53.400 ms  52.462 ms  51.107 ms
4  rt-lonap-a.thdo.bbc.co.uk (193.203.5.90)  61.162 ms  153.735 ms  223.000 ms
5  212.58.238.129 (212.58.238.129)  55.073 ms  52.633 ms  55.293 ms
6  te12-1.hsw0.cwwtf.bbc.co.uk (212.58.239.222)  55.004 ms  56.541 ms  51.065 ms
7  * * *
8  * * *
9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  * * *
20  * * *
21  * * *
22  * * *
23  * * *
24  * * *
25  * * *
26  * * *
27  * * *
28  * * *
29  * * *
30  * * *
[root@localhost ted]#   

[jane]

it's weird because I did simultaneous (almost) traceroutes from ubuntu and vista; ubuntu timed out like that last post but vista went through in 7 hops

[Ted]

it's weird because I did simultaneous (almost) traceroutes from ubuntu and vista; ubuntu timed out like that last post but vista went through in 7 hops

Yep just done the same tests. XP no problem, 7 hops. Linux, times out. How strange is that?

[jane]

spooky..............anything to do with MTUs etc I wonder
I can't change mine on Vista, router says 1500 but IDNet seem to have set it at 1460. Wouldn't have a clue as to how to go about messing with ubuntu especially at the moment as I've just spent all day upgrading and it's being a bit 'precious' at the moment

J.

[Sebby]

I haven't been around much tonight, so I don't know if there were any problems here, but hopefully it was just a temporary glitch. We have seen some routing issues recently that were outside IDNet's control, but the cause of this may well have been something else.

[Lance]

I'm guessing that is BT playing up, as in all the tracerts with timed out hops, the hops are all out of IDNet's network. 

[jane]

For anyone who's interested.........the Linux v Vista thing does seem to be a result of two things
For a start Linux uses UDP packets whereas Windows uses ICMP. The asterisks, if you use network tools traceroute, translate to "asymm" which basically means that the path to the host and back are different and could indicate some sort of 'logjam' along the path.
Oh yes and I discovered that Ubuntu now uses tracepath rather than traceroute so you live and learn.
Using tracepath I saw it was using pmtu 1500, as defined by the router setting. When I changed the MTU on eth0 to 1460......bam........it went through in 8 hops

before & after

jane@ubuntu:~$ tracepath www.bbc.net.uk
1:  ubuntu.mshome (192.168.0.5)                            0.265ms pmtu 1500
1:  192.168.0.1 (192.168.0.1)                              1.000ms
2:  telehouse-gw3-g0-1-400.idnet.net (212.69.63.243)    asymm  3  96.821ms
3:  rt-lonap-a.thdo.bbc.co.uk (193.203.5.90)            asymm  5 226.582ms
4:  212.58.238.153 (212.58.238.153)                      asymm  6 100.792ms
5:  212.58.239.62 (212.58.239.62)                        asymm  7 158.662ms
6:  no reply
7:  no reply
8:  no reply
9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  no reply
22:  no reply
23:  no reply
24:  no reply
25:  no reply
26:  no reply
27:  no reply
28:  no reply
29:  no reply
30:  no reply
31:  no reply
    Too many hops: pmtu 1500
    Resume: pmtu 1500

jane@ubuntu:~$ tracepath www.bbc.net.uk
1:  ubuntu.mshome (192.168.0.5)                            0.248ms pmtu 1460
1:  192.168.0.1 (192.168.0.1)                              1.065ms
2:  telehouse-gw2-lo1.idnet.net (212.69.63.51)            78.833ms
3:  telehouse-gw3-g0-1-400.idnet.net (212.69.63.243)      74.488ms
4:  rt-lonap-a.thdo.bbc.co.uk (193.203.5.90)            asymm  5  77.020ms
5:  212.58.238.129 (212.58.238.129)                      76.833ms
6:  212.58.238.33 (212.58.238.33)                        77.576ms
7:  pos6-0.rt0.mh.bbc.co.uk (212.58.239.30)              81.320ms
8:  www4.mh.bbc.co.uk (212.58.228.41)                    asymm  9  84.961ms reached
    Resume: pmtu 1460 hops 8 back 9

J

[Rik]

Presumably, packet fragmentation was causing the problem. Fascinating to see just how critical the MTU setting can be.