MWEB and Telkom Peering

<?php?>

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A client's domain is hosted with MWEB with about 14 mailboxes, the client has a Telkom line, for internet access. Due to MWEB and Telkom not peering locally, I had to install a temporary 3G ethernet router and modify the Linux Gateway's routing table to port only pop3.mweb.co.za and smtp.mweb.co.za traffic over the 3G router, thus enabling the client to send and receive e-mail without the high latency. This solution worked well and a few weeks ago I noticed that traffic between Telkom and MWEB were once again routed locally, so I uninsulated and decommissioned the 3G router. The setup worked 100% until Friday, all of a sudden traffic to pop3.mweb.co.za where dropped, but traffic to smtp.mweb.co.za remained unaffected.

Code:
[root@pdc /]# traceroute pop3.mweb.co.za
traceroute to pop3.mweb.co.za (196.28.76.80), 30 hops max, 40 byte packets
 1  196.25.202.193 (196.25.202.193)  2.433 ms  3.133 ms  3.654 ms
 2  obfn-ip-esr-1-wan.telkom-ipnet.co.za (196.25.90.225)  22.461 ms  26.997 ms  31.891 ms
 3  196.43.11.202 (196.43.11.202)  44.643 ms  49.388 ms  53.946 ms
 4  196.43.25.138 (196.43.25.138)  58.946 ms  63.672 ms  68.418 ms
 5  197-80-4-118.jhb.mweb.co.za (197.80.4.118)  75.794 ms  79.726 ms  84.386 ms
 6  vl-11.vic-hscore-1.mweb.co.za (196.22.169.227)  88.450 ms  26.485 ms  26.185 ms
 7  tengig-3-1.vic-core-sw1.mweb.co.za (196.22.169.66)  31.255 ms  40.639 ms  45.313 ms
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  *
[root@pdc /]#

From the route trace it is evident that the traffic is still routed locally, but dropped instead. MWEB support advised me to rather use pop3.mweb.net. Having 14 users, I decided to point requests to pop3.mweb.co.za to pop3.mweb.net by adding an entry in the Linux Gateway's hosts file. This worked great until this morning, when pop3.mweb.net, also became unreachable over the Telkom line.Now I am forced to re-setup the 3G router and remap traffic.

Whom is the stubborn party here, Telkom or MWEB. Should I advise the client to cancel the Telkom Tidus line (no ADSL available in this area), and install a solution or rather just migrate their domain away from MWEB?
 
Could you do the same trace to pop.smp.mweb.co.za
 
From my external testing it looks like that last hop core router is dropping external traffic for some sources,quite weird.

My traces from an overseas shell drops,but Webafrica came through without a hitch. I'd definitely poke @Mwebguy on twitter,this looks like an issue for 2nd level support in networks. Maybe some packets are being malformed and dropped

traceroute to pop3.mweb.co.za (196.28.76.80), 30 hops max, 60 byte packets
1 xxxx.net (xxxxx) 0.045 ms 0.028 ms 0.026 ms
2 ve152.cr02.iad1.mtsvc.net (70.32.64.245) 0.276 ms 0.267 ms 0.373 ms
3 mt-cr02.mediatemple.net (65.97.50.25) 0.215 ms 0.259 ms 0.292 ms
** snip **
13 pos0-0-0-0.mid-up-1.mweb.co.za (196.22.163.229) 320.365 ms 321.567 ms pos0-1-3-0.mid-up-1.mweb.co.za (196.22.163.233) 321.657 ms
14 TenGigE0-1-1-0.vic-up-1.mweb.co.za (196.22.169.209) 303.812 ms 308.864 ms 304.413 ms
15 vl-11.vic-hscore-1.mweb.co.za (196.22.169.227) 314.336 ms 303.938 ms 314.272 ms
16 tengig-3-1.vic-core-sw1.mweb.co.za (196.22.169.66) 311.774 ms 311.757 ms 303.266 ms
17 **
 
Wow. thanx, it's working again without the need for the 3G router. Now to clear bind9 and workstation's DNS cache.
 
I don't know what happened, but it's working again. Thanks for your help!

Code:
U:\>tracert pop3.mweb.co.za

Tracing route to pop3.mweb.co.za [196.28.76.80]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  pdc.bigskycoaches.co.za [192.168.1.1]
  2    <1 ms    <1 ms    <1 ms  196.25.202.193
  3  1619 ms  1365 ms  1570 ms  obfn-ip-esr-1-wan.telkom-ipnet.co.za [196.25.90.
225]
  4  1544 ms  1484 ms  1659 ms  196.43.11.202
  5  1857 ms  1645 ms  1770 ms  196.43.25.138
  6  2041 ms  1903 ms  2325 ms  197-80-4-118.jhb.mweb.co.za [197.80.4.118]
  7  2388 ms  2206 ms  1987 ms  vl-11.vic-hscore-1.mweb.co.za [196.22.169.227]
  8  2707 ms  2466 ms  2892 ms  tengig-3-1.vic-core-sw1.mweb.co.za [196.22.169.6
6]
  9  2680 ms  2464 ms  2840 ms  pop3.mweb.co.za [196.28.76.80]

Trace complete.

U:\>

High latency can be attributed to most clients downloading their e-mail concurrently.
 
No worries,just sent your info along to @Mwebguy,may have been a hiccup hehe
 
Ahrrr . . .

Now it's down again :(

Code:
[root@pdc ~]# ping pop3.mweb.co.za
PING pop3.mweb.co.za (196.28.76.80) 56(84) bytes of data.

--- pop3.mweb.co.za ping statistics ---
40 packets transmitted, 0 received, 100% packet loss, time 38997ms

smtp.mweb.co.za is still good though.

Code:
[root@pdc ~]# ping smtp.mweb.co.za
PING smtp.mweb.co.za (196.28.80.20) 56(84) bytes of data.
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=1 ttl=121 time=33.7 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=2 ttl=121 time=47.6 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=3 ttl=121 time=28.5 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=4 ttl=121 time=28.6 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=5 ttl=121 time=28.5 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=6 ttl=121 time=28.8 ms
64 bytes from smtp.mweb.co.za (196.28.80.20): icmp_seq=7 ttl=121 time=28.5 ms

--- smtp.mweb.co.za ping statistics ---
8 packets transmitted, 7 received, 12% packet loss, time 7003ms
rtt min/avg/max/mdev = 28.543/32.088/47.699/6.620 ms
[root@pdc ~]#
 
Weirdness,could you log it with the Business support centre ( 0860 000 158 )

Frequent issue with traffic routed to both pop3.mweb.co.za and pop3.mweb.net from external connections,packets dropped at tengig-3-1.vic-core-sw1.mweb.co.za (196.22.169.66).
 
I've also notified them,will update if I get any feedback
 
A client's domain is hosted with MWEB with about 14 mailboxes, the client has a Telkom line, for internet access. Due to MWEB and Telkom not peering locally, I had to install a temporary 3G ethernet router and modify the Linux Gateway's routing table to port only pop3.mweb.co.za and smtp.mweb.co.za traffic over the 3G router, thus enabling the client to send and receive e-mail without the high latency. This solution worked well and a few weeks ago I noticed that traffic between Telkom and MWEB were once again routed locally, so I uninsulated and decommissioned the 3G router. The setup worked 100% until Friday, all of a sudden traffic to pop3.mweb.co.za where dropped, but traffic to smtp.mweb.co.za remained unaffected.

Code:
[root@pdc /]# traceroute pop3.mweb.co.za
traceroute to pop3.mweb.co.za (196.28.76.80), 30 hops max, 40 byte packets
 1  196.25.202.193 (196.25.202.193)  2.433 ms  3.133 ms  3.654 ms
 2  obfn-ip-esr-1-wan.telkom-ipnet.co.za (196.25.90.225)  22.461 ms  26.997 ms  31.891 ms
 3  196.43.11.202 (196.43.11.202)  44.643 ms  49.388 ms  53.946 ms
 4  196.43.25.138 (196.43.25.138)  58.946 ms  63.672 ms  68.418 ms
 5  197-80-4-118.jhb.mweb.co.za (197.80.4.118)  75.794 ms  79.726 ms  84.386 ms
 6  vl-11.vic-hscore-1.mweb.co.za (196.22.169.227)  88.450 ms  26.485 ms  26.185 ms
 7  tengig-3-1.vic-core-sw1.mweb.co.za (196.22.169.66)  31.255 ms  40.639 ms  45.313 ms
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  *
[root@pdc /]#

From the route trace it is evident that the traffic is still routed locally, but dropped instead. MWEB support advised me to rather use pop3.mweb.net. Having 14 users, I decided to point requests to pop3.mweb.co.za to pop3.mweb.net by adding an entry in the Linux Gateway's hosts file. This worked great until this morning, when pop3.mweb.net, also became unreachable over the Telkom line.Now I am forced to re-setup the 3G router and remap traffic.

Whom is the stubborn party here, Telkom or MWEB. Should I advise the client to cancel the Telkom Tidus line (no ADSL available in this area), and install a solution or rather just migrate their domain away from MWEB?

Hi <?php?>

Thank you for bringing this to my attention.
As advised on twitter I will look into this for you and provide you with an update as soon as I can.

Kind regards,
MWEB Guy
 
Last edited:
Hi <?php?>

Thank you for bringing this to my attention.
As advised on twitter I will look into this for you and provide you with an update as soon as I can.

Kind regards,
MWEB Guy

Hi <?php?>,

I have checked if we have any reported pop3 issues and there is none.

Has your client checked to see if they are receiving mail on mc.mweb.co.za and have they tested turning off the firewall to see if mail comes through after that?

Have have they tested the email address on a different PC?

Have they done a telnet?

Please provide me with your clients MWEB email address and I'll investigate further.

Regards,

MWEB Guy
 
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