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DanC
PostPosted: Fri Apr 13, 2012 4:06 pm 
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I'm running this:

Code:
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(24)T5, RELEASE SOFTWARE (fc3)



Code:
DSL Mode:        ITU G.992.5 (ADSL2+) Annex A
Init FW:         init_AMR-5.0.007.bin
Operation FW:    AMR-E-0.0.026.bin
FW Source:       external
FW Version:      0.0.26
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soreilly
PostPosted: Fri Apr 13, 2012 4:37 pm 
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dieselboy wrote:
soreilly wrote:
Thanks for the replies guys.

I'm on a Be LLU line which is fairly stable (just found a microfilter which was dodgy and caused the voice side to interfere with the DSL side). At the moment I'm running 12.4.24(T6) with ADSL firmware v4.0.223.

I'll give the new firmware a go over the weekend.

Thanks,


I had stability issues with 12.2.24T6. The only version of 12.2.24 which was stable for me was the 12.2.24T1. I must have tried all of the other T's. Weird ATM interface issues as well. Like I said, I use O2 which may be different from your setup - i.e. I don't use a dialer interface for PPP.


Hi dieselboy,

Did you mean 12.4.24 instead? 12.2.24 seems a little old. :)
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dieselboy
PostPosted: Fri Apr 13, 2012 10:51 pm 
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I was probably getting confused with switch IOS sofware.

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SonicUK
PostPosted: Wed Apr 18, 2012 5:44 am 
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I'm running an 887 with version 15.2(1)T1 on a BT ADSL2+ line and getting constant ppp drops, and have hard-boot the router everytime to get it back online.

DSL Mode: ITU G.992.5 (ADSL2+) Annex A
Init FW: init_AMR-5.0.007.bin
Operation FW: AMR-E-0.0.026.bin
FW Source: external
FW Version: 0.0.26

Anybody else have any experience with this?
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dieselboy
PostPosted: Wed Apr 18, 2012 6:54 am 
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SonicUK wrote:
I'm running an 887 with version 15.2(1)T1 on a BT ADSL2+ line and getting constant ppp drops, and have hard-boot the router everytime to get it back online.

DSL Mode: ITU G.992.5 (ADSL2+) Annex A
Init FW: init_AMR-5.0.007.bin
Operation FW: AMR-E-0.0.026.bin
FW Source: external
FW Version: 0.0.26

Anybody else have any experience with this?


Yes I had this same problem with PPP dropping. Seemed to be an issue with the router itself as no matter which firmware and IOS version we still got that issue. However swapping the router for something else i.e. Draytek didn't experience the same problem. Although when we then purchased a replacement 887, the issue was still present. I concluded the issue was something to do with the ADSL provision in the DSLAM, however the reseller (ZEN) was uncooperative to communicate this to BT. Due to their stance (telling us things like Cisco isn't compatible with Zen's network) I recommended we switched providers as it was imperative we utilised the Cisco proprietary features.

Actually, I remember running some debug PPPs and the router doesn't hear anything from upstream and so down's ppp. Zen were saying they were not hearing anything from our end, so bit of a catch 22. A few techs stated they were seeing it up and working fine, however when I probed them as to why or how they though this it turned out they were looking at RADIUS logs on a server somewhere and not the connectivity itself.

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DanC
PostPosted: Wed Apr 18, 2012 7:04 am 
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SonicUK wrote:
I'm running an 887 with version 15.2(1)T1 on a BT ADSL2+ line and getting constant ppp drops, and have hard-boot the router everytime to get it back online.

DSL Mode: ITU G.992.5 (ADSL2+) Annex A
Init FW: init_AMR-5.0.007.bin
Operation FW: AMR-E-0.0.026.bin
FW Source: external
FW Version: 0.0.26

Anybody else have any experience with this?


Does the router have enough DRAM? Might be unrelated but I know IOS 15 uses double the amount of DRAM than the equivalent 12.4. This was a problem for us on the 877's, it works but eventually the router runs out of memory and you need to power cycle.
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SonicUK
PostPosted: Wed Apr 18, 2012 7:08 am 
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Thanks for the reply - yes i think it should be fine: Cisco 887M (MPC8300) processor (revision 1.0) with 236544K/25600K bytes of memory.
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dieselboy
PostPosted: Wed Apr 18, 2012 7:49 pm 
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I believe all 88x routers come with 256M minimum
87x are 128M

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SonicUK
PostPosted: Thu Apr 19, 2012 9:29 am 
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Sorry dieselboy i missed your first reply somehow.

Yeah i read through the thread before posting, not good news for me! It took me a while to convince the company to spend the few hundred notes on the Cisco!!

I've had BT on the case but they've concluded no fault of theirs, surprise surprise. I've already updated everything on the router to the latest firmware, no change, and there is a BT engineer coming out tomorrow.

Hopefully this can be resolved.. i guess i'll have to work out how to break it that we need a different router if not!
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dieselboy
PostPosted: Thu Apr 19, 2012 10:21 pm 
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Run some debugs for PPP. I bet you find similar to what I was seeing - this ultimately then is an issue at the DSLAM although for some reason, Cisco relies on those keepalives whilst routers like Draytek do not?
Is this service purchased though BT or a reseller?

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nickbeee
PostPosted: Sat Apr 28, 2012 3:19 pm 
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For completeness from my earlier contribution, here are the stats and version details from one of my 877s.

Code:
#sh dsl int atm0
ATM0
Alcatel 20190 chipset information
                ATU-R (DS)                      ATU-C (US)
Modem Status:    Showtime (DMTDSL_SHOWTIME)
DSL Mode:        ITU G.992.1 (G.DMT) Annex A
ITU STD NUM:     0x03                            0x2
Vendor ID:       'STMI'                          'TSTC'
Vendor Specific: 0x0000                          0x0000
Vendor Country:  0x0F                            0xB5
Chip ID:         C196 (0)
DFE BOM:         DFE3.0 Annex A (1)
Capacity Used:   99%                             100%
Noise Margin:    12.0 dB                          6.0 dB
Output Power:    17.5 dBm                        12.5 dBm
Attenuation:     58.0 dB                         31.0 dB
Defect Status:   None                            None
Last Fail Code:  None
Watchdog Counter: 0x5C
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction:     0x00
Interrupts:      8316 (0 spurious)
PHY Access Err:  0
Activations:     5
LED Status:      ON
LED On Time:     100
LED Off Time:    100
Init FW:         init_AMR-5.0.007.bin
Operation FW:    AMR-E-0.0.026.bin
FW Source:       external
FW Version:      0.0.26

                 Interleave             Fast    Interleave              Fast
Speed (kbps):          2912                0           640                 0
Cells:              3632634                0     114480339                 0
Reed-Solomon EC:         53                0            39                 0
CRC Errors:               7                0            25                 0
Header Errors:            8                0            16                 1
Total BER:                1940E-11               0E-0
Leakage Average BER:      1205E-16               0E-0
                        ATU-R (DS)      ATU-C (US)
Bitswap:               enabled            enabled
Bitswap success:          0                   0
Bitswap failure:          0                   0

LOM Monitoring : Disabled


DMT Bits Per Bin
000: 0 0 0 0 0 0 6 9 9 8 9 9 9 9 9 9
010: 9 9 8 9 8 8 8 8 7 7 7 8 7 6 6 0
020: 0 0 0 0 0 7 7 8 8 8 8 8 9 8 2 8
030: 9 A 9 A A A A A A A 8 9 9 A 9 A
040: 0 A A A 2 A A A A A A A A A A A
050: A A A A A A 9 9 9 9 9 9 9 9 8 8
060: 8 9 9 9 9 9 9 9 9 8 8 8 8 8 8 8
070: 8 8 8 7 8 8 7 7 7 7 7 6 6 5 5 0
080: 3 4 5 5 5 5 5 5 4 5 5 5 2 5 4 3
090: 0 4 3 3 0 2 3 2 2 2 2 0 0 0 0 0
0A0: 0 0 0 2 0 0 0 0 0 2 2 0 0 0 0 0
0B0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0D0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0E0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled


Version info:
Code:
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.4(15)T16, RELEASE SOFTWARE (fc2)

System image file is "flash:c870-advsecurityk9-mz.124-15.T16.bin"


ADSL firmware in flash: - As you can see I just rename the active one to adsl_alc_20190.bin and reload to test different versions.
Code:
24576K bytes of processor board System flash (Intel Strataflash)

Directory of flash:/

    2  -rwx    16486580  Mar 16 2002 18:01:48 +00:00  c870-advsecurityk9-mz.124-15.T16.bin
    3  -rwx        3179   Mar 1 2002 00:03:55 +00:00  sdmconfig-8xx.cfg
    4  -rwx      931840   Mar 1 2002 00:04:14 +00:00  es.tar
    5  -rwx     1505280   Mar 1 2002 00:04:38 +00:00  common.tar
    6  -rwx        1038   Mar 1 2002 00:04:50 +00:00  home.shtml
    7  -rwx      112640   Mar 1 2002 00:05:01 +00:00  home.tar
    8  -rwx     1002424  Mar 16 2002 17:55:55 +00:00  adsl_alc_20190.4.0.017.bin
    9  -rwx     1001980  Jan 26 2012 14:42:15 +00:00  adsl_alc_20190.bin

23482368 bytes total (2426880 bytes free)

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dieselboy
PostPosted: Sun Apr 29, 2012 12:01 am 
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Seems you are pretty far from the exchange? Does your phone line have any noise on the line?

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SonicUK
PostPosted: Tue May 01, 2012 4:59 am 
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Had an engineer out, they found no faults on the line but "reset" their side of things, however i'm still seeing the line drop periodically. When it's up though, it's solid.

Very frustrating.

dieselboy wrote:
Run some debugs for PPP. I bet you find similar to what I was seeing - this ultimately then is an issue at the DSLAM although for some reason, Cisco relies on those keepalives whilst routers like Draytek do not?
Is this service purchased though BT or a reseller?


The service is directly from BT.

I'll enable "debug ppp negotiation" and see what i'm getting... i did have ppp authentication on and was getting.

000912: Apr 10 18:11:31.426 BST: Vi2 PPP: Using dialer call direction
000913: Apr 10 18:11:31.426 BST: Vi2 PPP: Treating connection as a callout
000914: Apr 10 18:11:31.426 BST: Vi2 PPP: Session handle[8700000F] Session id[11]
000915: Apr 10 18:11:52.578 BST: Vi2 PPP: Using dialer call direction
000916: Apr 10 18:11:52.578 BST: Vi2 PPP: Treating connection as a callout
000917: Apr 10 18:11:52.578 BST: Vi2 PPP: Session handle[DA000010] Session id[12]
000918: Apr 10 18:12:13.730 BST: Vi2 PPP: Using dialer call direction
000919: Apr 10 18:12:13.730 BST: Vi2 PPP: Treating connection as a callout
000920: Apr 10 18:12:13.730 BST: Vi2 PPP: Session handle[99000011] Session id[13]
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dieselboy
PostPosted: Tue May 01, 2012 5:59 am 
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Standard BT kind of response.

Are those debugs during an issue?
Does your SNR fluctuate?

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