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Odd routing

rockyhorror
Grafter
Posts: 48
Thanks: 1
Registered: 03-01-2008

Odd routing

Hi,
Although I am a Plusnet customer, I have an interesting issue with my work BT Internet connections and Plusnet infrastructure.
A tracert www.bbc.co.uk and a tracert bbc.co.uk yield different paths with one of them failing at hop 6. I noticed that within the hops is Plusnet, hence this post.
Is BT Internet using Plusnet infrastructure exclusively now?
I also understand from a friend that although they are BT customers they have had to change MTU setting due to the Plusnet routing.
Any ideas?
Cheers,
Richard
4 REPLIES
James
Grafter
Posts: 21,036
Registered: 04-04-2007

Re: Odd routing

Hi Richard,
I've not heard of anything like that before.  Unless it's part of the Broadband Scope platform?
Mind posting a traceroute?
rockyhorror
Grafter
Posts: 48
Thanks: 1
Registered: 03-01-2008

Re: Odd routing

Hello James,
Results below:
bbc.co.uk
1    <1 ms    <1 ms    <1 ms  192.168.0.1
2    20 ms    14 ms    16 ms  lo0-plusnet.pte-ag2.plus.net
3    32 ms    14 ms    14 ms  ge0-0-0-504.pte-gw2.plus.net
4    18 ms    21 ms    15 ms  vl23.thn-gw2.plus.net
5   208 ms   224 ms   207 ms  rt0.thdo.bbc.co.uk
6    14 ms    17 ms    16 ms  212.58.238.133
7    15 ms    18 ms    15 ms  rdirslb0.thdo.bbc.co.uk
8    20 ms    16 ms    20 ms  virtual3.rbsov.bbc.co.uk
www.bbc.co.uk
1    <1 ms    <1 ms    <1 ms  192.168.0.1
2    18 ms    16 ms    29 ms  lo0-plusnet.pte-ag2.plus.net
3    15 ms    29 ms    17 ms  ge0-0-0-504.pte-gw2.plus.net
4   103 ms   220 ms   236 ms  vl23.thn-gw2.plus.net
5    15 ms    14 ms    14 ms  rt0.thdo.bbc.co.uk
6    26 ms    18 ms    16 ms  212.58.238.133
7    14 ms    15 ms    15 ms  212.58.239.58
8     *        *        *     Request timed out.

Thanks,
Richard
Moderator
Moderator
Posts: 17,997
Thanks: 1,438
Fixes: 154
Registered: 11-01-2008

Re: Odd routing

It's the bbc, www.bbc.co.uk doesn't respond to ping but bbc.co.uk does.

Customer / Moderator / If it helped click the thumb / If it fixed it click 'This fixed my problem'

Community Gaffer
Community Gaffer
Posts: 13,098
Thanks: 895
Fixes: 74
Registered: 04-04-2007

Re: Odd routing

Richard, are those traceroutes from your BT work connection? If so, James' assumption is very likely to be correct and your work connection is probably being supplied through this.

Bob Pullen
Plusnet Products Team
If I've been helpful then please give thanks ⤵