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Re: (ASCEND) mail attachment problem
HI Jerry ,
IMHO, it looks like it is the MTU misconfiguation problems .
I have a few points here , might be you want to try those
1) Just to confirm it is the MTU size, could u try dial into the failing
max and then ping your ISP network with large packet ( packet size > 1600
) and then use a smaller packet as well ( packet size < 1400 ) ..
2) Have you check your failing MAX MRU size ? ...
If you are using the MAX 4000 , then check it under Ethernet--> Answer
---> PPP --> MRU
set it to 1500 as well ..
3) Is your T1 line connected to your upstream provider terminated in your
Cisco Router ? If yes, Is the encapsulation PPP or HDLC ? Otherwise can u
use enable CDP neighbor to check what equipment your ISP used ? It your ISP
is using CISCO equipment , then that will be most likely reason that you
don't encounter any problems
Cheers
At 09:03 10-05-99 -0500, Jerry O'Brien wrote:
>We have a pair of Adtran 56/64 DSU/CSU terminating the 65K line. Both are
>set to 1500 MTU. I'm not sure about upstream provider's equipment, but from
>the failing Max we're going over the 56K line, through a Cisco 2501 router,
>over the LAN to the 2nd Max (the one that users can send the attachment
>through), and then out the serial line through a T1 CSU and out to the
>upstream. It seems to me the connection to our upstream provider must be OK,
>since the 2nd Max works.
>
>The Cisco MTU is set to 1500 (see below) and the errors look reasonably low.
>
>Jerry
>
>Serial0 is up, line protocol is up
> Hardware is HD64570
> Internet address is 192.168.1.1/30
> MTU 1500 bytes, BW 56 Kbit, DLY 20000 usec, rely 255/255, load 22/255
> Encapsulation PPP, loopback not set, keepalive set (10 sec)
> LCP Open
> Listen: cdp
> Open: ipcp
> Last input 00:00:00, output 00:00:00, output hang never
> Last clearing of "show interface" counters never
> Queueing strategy: fifo
> Output queue 0/40, 15594 drops; input queue 0/75, 0 drops
> 5 minute input rate 1000 bits/sec, 2 packets/sec
> 5 minute output rate 5000 bits/sec, 2 packets/sec
> 4846542 packets input, 410033079 bytes, 0 no buffer
> Received 2 broadcasts, 0 runts, 0 giants
> 1704 input errors, 1704 CRC, 0 frame, 0 overrun, 0 ignored, 1619 abort
> 5324957 packets output, 2416421820 bytes, 0 underruns
> 0 output errors, 0 collisions, 57 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 45283 carrier transitions
> DCD=up DSR=up DTR=up RTS=up CTS=up
>----- Original Message -----
>From: KY Lee <kylee@tm.net.my>
>To: Jerry O'Brien <jobrien@cuttingedge.net>; ## Dusty Carden
><dusty@netease.net>; <ascend-users@bungi.com>
>Sent: Saturday, May 08, 1999 11:56 PM
>Subject: Re: (ASCEND) mail attachment problem
>
>
>> Hi ,
>>
>> This could be the MTU size misconfiguration for the PPP. I wonder what
>> equipment do you use to connect to your upstream service Provider and also
>> terminating equipment used by your service provider?. Besides that what
>> type of equipment are u connecting your 56K leased line to the LAN.. ?
>More
>> details will enable me to rule out whether it is MTU/MRU problems. ..
>> Cheerios .
>>
>> At 09:05 06-05-99 -0500, Jerry O'Brien wrote:
>> >Thanks Dusty,
>> >
>> >Most of the folks who are having trouble here are using very recent Win98
>> >boxes, so I doubt whether their DUN or winsock are old. I forgot to
>mention
>> >I am running 6.1.7 on both maxen. The one that works sits on our central
>LAN
>> >and connects via T1 to our upstream provider. The failing unit connects
>to
>> >the LAN via 56K leased line. No other problems with the failing unit,
>just
>> >this attachment thing.
>> >
>> >Jerry
>> >
>> >
>> >----- Original Message -----
>> >From: ## Dusty Carden <dusty@netease.net>
>> >To: Jerry O'Brien <jobrien@cuttingedge.net>
>> >Sent: Thursday, May 06, 1999 8:06 AM
>> >Subject: Re: (ASCEND) mail attachment problem
>> >
>> >
>> >> I had this with a couple of WIN95 clients. Upgrading their winsock
>> >> and dial up networking fixed it. This was through a MAX 6. They could
>> >> dial in to the 4004 in the same rack and have no problems. Both boxes
>> >> are running 6.1.7. I was surprised that upgrading their winsock fixed
>the
>> >> problem and I am still not sure what the deal was.
>> >>
>> >> Dusty
>> >>
>> >> ----- Original Message -----
>> >> From: Jerry O'Brien <jobrien@cuttingedge.net>
>> >> To: <ascend-users@bungi.com>
>> >> Sent: Wednesday, May 05, 1999 11:23 PM
>> >> Subject: (ASCEND) mail attachment problem
>> >>
>> >>
>> >> Hi,
>> >>
>> >> I'm out of ideas here...
>> >>
>> >> I have a group of users who can't send email attachments through one of
>my
>> >> Max 4048s. Another identical box at a different site works fine, so I'm
>> >> ruling out customer equipment and DNS. Anyone know of anything in the
>4K
>> >> configuration that could cause this? It happens to files as small as
>40K,
>> >so
>> >> I don't think it's a size problem. My mail log (Linux, sendmail 8.?)
>says
>> >> the server is waiting to receive mail data, but then times out after
>two
>> >> hours. I think the clients are giving up and closing sooner, but the
>mail
>> >> server always waits for the timeout.
>> >>
>> >> TIA
>> >>
>> >> Jerry O'Brien
>> >>
>> >>
>> >> ++ Ascend Users Mailing List ++
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>> >> To get FAQ'd: <http://www.nealis.net/ascend/faq>
>> >>
>> >>
>> >>
>> >
>> >
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>> >
>>
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>> KY Lee
>> Network Development Engineer, !networX
>> !nternet Services, COINS
>> TELEKOM MALAYSIA BERHAD [128740-P]
>> Fax : +60 -(0)3 - 7042204
>> http://www.tm.net.my
>>
>> Time Zone : GMT+ 8
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>>
>>
>
>
>++ Ascend Users Mailing List ++
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>
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
KY Lee
Network Development Engineer, !networX
!nternet Services, COINS
TELEKOM MALAYSIA BERHAD [128740-P]
Fax : +60 -(0)3 - 7042204
http://www.tm.net.my
Time Zone : GMT+ 8
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
++ Ascend Users Mailing List ++
To unsubscribe: send unsubscribe to ascend-users-request@bungi.com
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