Reviews:
 ·AEI Internet
1 edit | Trouble with ADSL connection after a weird router reset 877 Hi,
I've been on that router for almost a year, and it lost carrier last week. The CD light was flashing frequently and router was not accessible. I found that it's reset itself to factory settings and had to restore config from TFTP (attached below).
The router still would not train to the ISP signal refusing to bring up ATM0.
Attached is DLS training log.
I have a backup SpeedTouch modem which trains and keeps carrier on the same RJ11 just fine.
Can anybody help troubleshoot what happened to 877's modem looking at the attached DSL training log?
Thank you! |
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| The config the last known working version before the 877 got factory reset?
Pretty much to troubleshoot this, you'd need to follow Cisco's DSL troubleshooting
guide, DSL training logs don't really tell us much.
Regards |
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Reviews:
·AEI Internet
| Unfortunately that guide kicks me out right in the very beginning - CD light on my router is neither ON nor OFF - it's flashing frequently. Thus I am unable to proceed further in the guide.
Don't get me wrong - I've gone thru PPPoE guide - it does not cover my situation. That would have been a piece of cake if any of it's suggestions was the root cause. |
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| reply to cdn_dsl
Do you have a regular DSL modem you can try just to ensure it gets line sync? |
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| Yes, that's what I stated in the original post. |
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| Completely missed that! Sorry. I will take a gander at your logs and see if anything is blatantly incorrect. Do you have any logs/data from the regular modem? |
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| reply to cdn_dsl
This line is wrong:
ppp authentication chap pap cllin
should be "callin". |
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| reply to cdn_dsl
interface ATM0
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
no atm ilmi-keepalive
dsl sync interval 30
dsl sync mode itu
dsl operating-mode auto
dsl bitswap both
!
interface ATM0.1 point-to-point
no ip redirects
no ip unreachables
no ip proxy-arp
pvc 0/35
pppoe-client dial-pool-number 1
!
!
interface Dialer0
description $FW_OUTSIDE$
ip address 74.116.186.250 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip mtu 1464
ip nat outside
ip virtual-reassembly in
encapsulation ppp
ip tcp adjust-mss 1424
dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname xxxxxx@xxxxxxxxxxx.net
ppp chap password 0 xxxxxxxxxxxx
ppp pap sent-username xxxxxxx@xxxxxxxxxx.net password 0 xxxxxxxx
ppp ipcp route default
ppp multilink
And remove your:
ip route 0.0.0.0 0.0.0.0 74.116.186.1
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Reviews:
·AEI Internet
1 edit | reply to OVERKILL
> callin
I fixed that but it did not make any effect. Actually I've noticed that bit right after posting the sh run and fixed it back then.
The modem begins to sync, CD flashes slowly as it would normally, then goes off and begins flashing very quickly. That tells me the router is not even getting into PPP authentication.
As my backup is Alcatel SpeedTouch, it should have some advanced diagnostics, but I have no idea how to collect them. I would imagine that the modem would have to be connected directly to a NIC in a PC for that, but even then I would not know what commands to use. |
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| reply to cdn_dsl
I would try different firmware if the above changes don't work. They available from Cisco's site.
I see you are running the most recent, but maybe try dropping down to the most recent 3-series to test with.
BTW, are you synching to EBOX's DSLAM or BELL's? |
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Reviews:
·AEI Internet
| I have no way of knowing to whose DSLAM I am synching, as Ebox stuff is very reluctant and replies to my questions with cryptic one-liners.
As for firmware, what makes you think that another version would work any better? I've tried several and they all had issues with signal stability except for the most recent one, on which I stayed for almost a year.
I am very reluctant to 'just try things' w/o good justification.
What I am really interested in is knowing what quick flashing CD light means. |
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| Because various firmwares have various compatibility issues with various DSLAM's 
Bell has been upgrading their DSLAM's for "fibe" lately, and one of the ISP's I deal with has had compatibility issues with these new DSLAM's. Cisco 877's DO work however, but they use the old 3-series firmware, which is why I suggested it.
It is unfortunate that Ebox is so reluctant to share this information with you, as it could be quite pertinent to your situation. I use NEXICOM for example, and depending on where you are determines whether you sync to their OCCAM ADSL2+ DSLAM or a Bell remote, which can be oldschool plane-Jane ADSL, ADSL2+, or VDSL2 for the new "fibe" service.
The rapidly blinking LED usually indicates that the line is training-up. Once it goes solid, sh dsl int will give you the results. Since you aren't getting past this stage, it is indicating that it isn't training up correctly. The above settings changes I made are known-working from one of my own routers. I can't say if they will help or not, but are at least worth trying.
-If there was a DSLAM upgrade, there may be a firmware or chipset compatibility issue with your 877. It may also be a DSLAM setting, which would have to be changed by the ISP. My HWIC-1ADSL for example won't train at anything over 14Mbit unless some specific settings are changed on the DSLAM itself. Only then can I get 18+Mbit out of it.
-If you were moved from one port to another on the DSLAM, the port settings may be different from your previous port and are causing the 877 not to sync.
-When your router "reset itself" (which in of itself is VERY strange), it may have been because damage was sustained to the modem. In which case no number of settings is going to fix it. It could also have corrupted the firmware for the modem.
Unfortunately, a lot of this stuff requires a cooperative ISP in order to troubleshoot and resolve in any sort of timely manner. Otherwise you are left shooting in the dark. They will have access to data telling them why the sync failed, WHAT failed...etc. That could help resolve this quickly. |
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|  in show dsl interface
check FW Version it should be
Init FW: init_AMR-4.0.015.bin
Operation FW: AMR-4.0.015.bin
FW Version: 4.015
--
remember posting here are generated by problems people experience, not the overall performance of the device in the field |
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| I don't understand why you are grinning. Did you look at the attached dsl training log? You'd found what you've posted. |
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| said by cdn_dsl:I don't understand why you are grinning. Did you look at the attached dsl training log? You'd found what you've posted.
Agreed. One of the first things I checked was what version you were running. 4.0.15 is the same one I'm using for my HWIC. |
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Reviews:
·AEI Internet
| I don't think AndrzeiS will contribute anything of value with his attitude, however...
Overkill, about the HWICs: are you using HWIC-1ADSL or HWIC-1ADSL-M?
The former are dime a dozen, while the later are the neighbourhood of $500 as I understand. When 877 kicked the bucket I started thinking of getting a 1841 with HWIC-1ADSL, but with the upgrade to ADSL2+ by Bell I am afraid they would become useless. |
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1 edit | The HWIC-1ADSL is the ADSL2+ HWIC. And yeah, it is around $500.00. I couldn't find an Annex-M one.
They also have a VDSL2 HWIC, but it isn't backwards-compatible with ADSL and ADSL2+ (at least from what I could tell from the spec sheet), so I haven't bothered getting one. |
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| There is a couple of 1ADSL-Ms on the Ebay right now, one in Australia another in UK if I remember correctly. Both are pricey.
So are you saying that 1ADSL-M is not required for ADSL2+? |
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| said by cdn_dsl:There is a couple of 1ADSL-Ms on the Ebay right now, one in Australia another in UK if I remember correctly. Both are pricey.
So are you saying that 1ADSL-M is not required for ADSL2+?
Correct. The -M is only required for Annex-M, which most ISP's don't support anyways. You need the same one I have for ADSL2+
Here's a speedtest of my 1841:
That is with my ISP-provided Comtrend ADSL/ADSL2+/VDSL2 modem setup in bridge mode.
I get similar speeds with the HWIC, but with the OCCAM DSLAM I'm sync'd to, the Comtrend is more stable than the HWIC, so I'm just using that now. |
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cramer
join:2007-04-10
Raleigh, NC
kudos:7 | reply to cdn_dsl
Looks like it's been fried. Your training log shows it cannot find any usable signals. (if I'm reading it right) Was there any lightning or power issues lately? (even a brief power blip can do very bad things.) |
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