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Standard User theblarney
(newbie) Tue 02-Feb-10 10:15:50
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: theblarney] [link to this post]
 
Hi,

I did mention that I would post back.

Unfortunately I did reset again last night and again this morning but this time there is a bit more information in the logs.

000247: Feb 2 08:55:06.715: %LINK-3-UPDOWN: Interface ATM0, changed state to down
000248: Feb 2 08:55:07.715: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down
000249: Feb 2 08:55:50.531: %DIALER-6-UNBIND: Interface Vi1 unbound from profile Di0
000250: Feb 2 08:55:50.535: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to down
000251: Feb 2 08:55:51.531: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to down
000252: Feb 2 08:55:52.942: %LINK-3-UPDOWN: Interface ATM0, changed state to up
000253: Feb 2 08:55:53.942: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to up
000254: Feb 2 08:56:12.909: %DIALER-6-BIND: Interface Vi1 bound to profile Di0
000255: Feb 2 08:56:12.913: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
000256: Feb 2 08:56:14.496: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed state to up

Before it just logged that the ATM0 interface went down and came back up again.

I did think about using the Draytek Vigor 120 as a modem but that would mean swapping out my 877W for a 881W which is more expensive.

BT are also talking about downgrading my circuit to 8mb rather than 20mb.
Standard User JonRennie
(knowledge is power) Tue 02-Feb-10 14:09:53
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: theblarney] [link to this post]
 
Try updating your ADSL firmware (not the whole IOS) :

ftp://ftp.cisco.com/pub/access/800/

wink Comms is hard wink
Standard User Samadeus
(newbie) Tue 02-Feb-10 18:25:03
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: JonRennie] [link to this post]
 
There is a firmware release (22nd Oct) which resolves an intermittency problem on BT's 21CN network.


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Standard User theblarney
(newbie) Tue 02-Feb-10 22:52:00
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: Samadeus] [link to this post]
 
I have loaded a microcode onto the router 4.0.0.18 i think which has enabled me to set ADSL2+ as the operating mode but i am still getting the drop.

The code was suggested by BT and was specific to my router.
Standard User dv8
(newbie) Wed 03-Feb-10 23:46:44
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: theblarney] [link to this post]
 
I am going mad for about 12 days. We moved to new offices that are on 21CN with BT. My Cisco 877 router is up and down like a yo-yo. They have lifted the line had 3 engineers out, swapped cables etc, but to no joy.

I desperatley need to get hold of the new 4.0.0.18 microcode. I have tried the ftp link in the forum but have had no luck. Can anyone email it to me or tell me how to get it. I am desperate to get a stable line. I have 40 people bugging me all day and its costing my business loads.

Also can you post some instructions and commands to load it as I am not to sure how to do it.

Please HELP!!!!!!!!!!!!
Standard User theblarney
(newbie) Thu 04-Feb-10 15:27:57
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: dv8] [link to this post]
 
Send me a private message with your company email address and ill send you the details.
Standard User jimwillsher
(fountain of knowledge) Wed 17-Mar-10 12:46:02
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: theblarney] [link to this post]
 
Sorry to trawl up an old thread, but I'm hitting exactly the same. Can the people who posted here confirm if 4.0.018 seems to fix it for them? I've installed that version this morning and (touch wood) it does look a bit better.

Many thanks,


Jim

My line (not necessarily the line referred to in this post, if any):
ADSL24 (832 / 8128)
Edinburgh IPSC
Cisco 877 Router
Eclipse > Ace > ADSL24
Standard User theblarney
(newbie) Wed 17-Mar-10 15:23:31
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: jimwillsher] [link to this post]
 
Hi Jim,

It has seemed to work for me yes.

Thanks

Gavin
Standard User jimwillsher
(fountain of knowledge) Wed 17-Mar-10 15:37:40
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: theblarney] [link to this post]
 
Many thanks for confirming.

When I originally installed the new firmware it didn't seem to make any difference.

But I then added dsl operating-mode adsl2+ and it now seems fine - even though sh int dsl atm0 showed that it was running in adsl2+ mode. Perhaps this command is critical, rather than relying on auto-detect.


Jim

My line (not necessarily the line referred to in this post, if any):
ADSL24 (832 / 8128)
Edinburgh IPSC
Cisco 877 Router
Eclipse > Ace > ADSL24
Standard User zedbong
(learned) Sat 20-Mar-10 19:32:25
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Re: BT Business Broadband ADSL2+ and Cisco 877


[re: jimwillsher] [link to this post]
 
I have had no end of problems with Cisco 877 on BT ADSL2+

I eventually got hold of the latest firmware, but it didn't make much difference.

Not only was the connection up and down like the proverbial bride's night dress, but so was the SNR, varying between 15db to 0db wildly over the space of a few seconds.

I bought a 25 quid Zyxel to see if it made any difference and it was rock solid from day one. I then got a Vigor 2820 and that has been even better, consistently syncing a whole 1meg higher than the Zyxel, which was in turn 1 to 2 meg better than the Cisco.

I like Cisco routers a lot. They're very flexible and powerful and solid, but the ADSL side, at least on the 877, appears to be rather poor at the moment. Whether they will get to the bottom of it and bring out another modem firmware that fixes it remains to be seen.

Mind you, the model of modem in the 877 I have is apparently incapable of running in Annex M mode so I would have to have changed sooner or later anyway.

Finally, a mate of mine has an 877 on a Be line which we've sat and watched do pretty much the same thing (again with both old 3.x and 4.0.0.18 firmware). I've arranged to lend him the Zyxel to see if it improves matters.

To monitor SNR without any SNMP tools incidentally, issue the command :
sh ds in at 0 (ie. show dsl interface atm 0)

You can refresh it by pressing up arrow twice then return in quick succession repeatedly...
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