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Message 1 of 7

Packet loss on route to various places

Hi there,

 
I'm seeing a lot of packet loss on the route my connection has been given.
 
It appears that 31.55.186.197 is where the packet loss is happening, I'm showing about 50-60% packet loss from that hop.
 
 Host                                Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 10.101.0.1                        0.0%    42    0.3   0.4   0.2   1.2   0.2
 2. 192.168.0.1                       0.0%    42    1.1   1.1   0.8   2.3   0.2
 3. 172.16.10.238                     0.0%    42    1.8   2.3   1.5   3.4   0.5
 4. 31.55.186.197                    56.3%    42    5.5   5.1   4.5   5.8   0.4
 5. 31.55.186.204                     0.0%    42    7.1   5.6   4.6   7.5   0.6
 6. core3-hu0-11-0-3.faraday.ukcore.  0.0%    42    6.0   5.8   5.0   8.4   0.6
 7. peer2-et4-1-0.slough.ukcore.bt.n  0.0%    42    5.7   8.9   5.4  35.1   7.7
 8. linx1.orbital.net                 0.0%    42    7.0   6.6   5.5   8.5   0.7
...
 
31.55.186.197 belongs to BT;
 

$ whois 31.55.186.197
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

% Information related to '31.55.184.0 - 31.55.187.255'

% Abuse contact for '31.55.184.0 - 31.55.187.255' is 'abuse@bt.com'

inetnum: 31.55.184.0 - 31.55.187.255
netname: BT-21CN-TMAN-V2
descr: BT-21CN-TMAN-V2
country: GB
admin-c: BR2649-RIPE
tech-c: BR2649-RIPE
status: ASSIGNED PA
remarks: Please send abuse notification to abuse@bt.net
remarks: INFRA-AW
mnt-by: BTNET-MNT
mnt-lower: BTNET-MNT
mnt-routes: BTNET-MNT
created: 2013-08-16T08:40:35Z
last-modified: 2013-08-16T08:40:35Z
source: RIPE

role: BT RAM
address: BT
address: UK
admin-c: AA12126-RIPE
tech-c: AA12126-RIPE
nic-hdl: BR2649-RIPE
mnt-by: BTNET-MNT
created: 2012-04-10T15:28:46Z
last-modified: 2012-04-10T15:28:46Z
source: RIPE # Filtered

% Information related to '31.48.0.0/13AS2856'

route: 31.48.0.0/13
descr: BT Public Internet Service
origin: AS2856
mnt-by: BTNET-INFRA-MNT
created: 2011-02-11T10:32:17Z
last-modified: 2014-07-30T09:04:12Z
source: RIPE # Filtered

 
I hope this helps, I'd really like to get this sorted as soon as possible.
 
Thanks.
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6 REPLIES 6
1,024 Views
Message 2 of 7

Re: Packet loss on route to various places

There is nothing to sort out. You are not suffering any packet loss.

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985 Views
Message 3 of 7

Re: Packet loss on route to various places

Isn't some packet loss part and parcel of tcp/ip

Especially in the congestion control algorithm 

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970 Views
Message 4 of 7

Re: Packet loss on route to various places

No.

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967 Views
Message 5 of 7

Re: Packet loss on route to various places

Isn't this line;
 4. 31.55.186.197                    56.3%    42    5.5   5.1   4.5   5.8   0.4
showing 56.3% loss?

What is this if not?

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961 Views
Message 6 of 7

Re: Packet loss on route to various places

If those packets were lost how did the destination get them all?

All you are seeing is a router treating ICMP requests as low priority and not replying in the alloted time. The packets were still passed on to the next router.

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947 Views
Message 7 of 7

Re: Packet loss on route to various places

@pippincp

I thought AMID used it to control the congestion window ?

 

Or more, to detect and control

 

Been a very long time since college so I have a lot of packet loss myself 🙂

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