VDSL Sync Issue on a 877VA

traveyb · 26 Jan 2015 at 10:34

Hi All,
So I want to swap out my awful Sky SR102 with a 877VA (which will replace both the SR102 and a 1841).
Even with a blank config, I cannot get carrier sync on my line. I've tried different IOS versions, different modem firmware, tried the master socket but I just get the below logs. Took the router round my girlfriends and it syncs with her standard ADSL just fine. Any ideas?

Jan 25 22:17:04.971: VDSL 0: SM_LINE_DOWN boolean event
Jan 25 22:17:06.979: VDSL 0: vdsl line state : discovery
Jan 25 22:17:06.979: VDSL 0: SM_LINE_TRAIN boolean event
Jan 25 22:17:06.979: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:17:06.979: @@@ vdsl_daemon_sm VDSL 0: training -> training
Jan 25 22:17:17.987: VDSL 0: vdsl line state : fullinit
Jan 25 22:17:20.671: VDSL 0: VDSL_LINE_TRAIN_TIMER (sm 8)
Jan 25 22:17:25.999: VDSL 0: SM_LINE_DOWN boolean event
Jan 25 22:17:28.007: VDSL 0: vdsl line state : discovery
Jan 25 22:17:28.007: VDSL 0: SM_LINE_TRAIN boolean event
Jan 25 22:17:28.007: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:17:28.011: @@@ vdsl_daemon_sm VDSL 0: training -> training

Jan 25 22:21:42.099: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:21:42.099: @@@ vdsl_daemon_sm VDSL 0: training -> training 00x 04x 11x 02x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 42x
Jan 25 22:21:42.327:* 4294967242x 55x 16x 127x 4294967286x 4294967260x 4294967288x 00x 00x 00x 00x

Jan 25 22:33:33.487: VDSL 0: vdsl line state : fullinit
Jan 25 22:33:40.499: VDSL 0: SM_LINE_DOWN boolean event
Jan 25 22:33:42.507: VDSL 0: vdsl line state : discovery
Jan 25 22:33:42.507: VDSL 0: SM_LINE_TRAIN boolean event
Jan 25 22:33:42.507: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:33:42.507: @@@ vdsl_daemon_sm VDSL 0: training -> training
Jan 25 22:33:51.519: VDSL 0: SM_LINE_DOWN boolean event 00x 04x 11x 02x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 42x
Jan 25 22:33:58.195:* 4294967242x 55x 16x 127x 4294967268x 4294967180x 4294967288x 00x 00x 00x 00x
Jan 25 22:34:24.527: VDSL 0: vdsl line state : discovery
Jan 25 22:34:24.527: VDSL 0: SM_LINE_TRAIN boolean event
Jan 25 22:34:24.527: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:34:24.527: @@@ vdsl_daemon_sm VDSL 0: training -> training 00x 04x 11x 02x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 00x 42x
Jan 25 22:34:28.195:* 4294967242x 55x 16x 127x 4294967268x 4294967180x 4294967288x 00x 00x 00x 00x
Jan 25 22:34:35.535: VDSL 0: vdsl line state : fullinit
Jan 25 22:34:43.547: VDSL 0: SM_LINE_DOWN boolean event
Jan 25 22:34:44.555: VDSL 0: vdsl line state : discovery
Jan 25 22:34:44.555: VDSL 0: SM_LINE_TRAIN boolean event
Jan 25 22:34:44.555: * * vdsl_daemon_sm VDSL 0: during state training, got event 17(line_training)
Jan 25 22:34:44.555: @@@ vdsl_daemon_sm VDSL 0: training -> training

ChrisD. · 26 Jan 2015 at 10:37

Have you extracted the MER details from your Sky SR102 Hub and put them into the 877VA (if it supports it)?

Or am I missing something here?

mad_allan · 26 Jan 2015 at 10:43

I was just about to ask the same. You need the details for the dialler interface to establish any sync

mad_allan · 26 Jan 2015 at 10:55

Actually, looking at one of the routers here, you don't need the dialler interface, just a sub port on et0

N.B. The mac is the WAN mac of your sky router and your client id is your hostname in hex.

interface Ethernet0.101
encapsulation dot1Q 101
ip dhcp client request classless-static-route
ip dhcp client client-id hex <client-id in hex>
ip dhcp client hostname <username>|<password>
ip address dhcp
no ip redirects
no ip proxy-arp
ip flow ingress
ip flow egress
ip nat outside
no ip virtual-reassembly in

traveyb · 26 Jan 2015 at 10:56

I have tried with a blank config and a basic test config, I would have thought the line would sync without the config? It did round my girlfriends anyway.
Anyway, basic config:

version 15.1
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
memory-size iomem 10
crypto pki token default removal timeout 0
!
!
ip source-route
!
!
!
!
!
ip cef
no ipv6 cef
!
!
multilink bundle-name authenticated
license udi pid CISCO887VA-K9 sn FCZ1633C05Z
license boot module c880-data level advipservices
!
!
!
!
!
!
controller VDSL 0
!
!
!
!
!
!
!
!
interface Ethernet0
mac-address <mac>
no ip address
!
interface Ethernet0.101
encapsulation dot1Q 101
ip dhcp client request classless-static-route
ip dhcp client client-id hex <client-id>
ip dhcp client hostname <username>|<password>
ip address dhcp
no ip redirects
no ip proxy-arp
ip flow ingress
ip flow egress
ip nat outside
no ip virtual-reassembly in
!
interface ATM0
no ip address
shutdown
no atm ilmi-keepalive
!
interface FastEthernet0
switchport access vlan 1
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip flow ingress
ip flow egress
ip nat inside
ip virtual-reassembly in
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip nat inside source list NATACL interface Ethernet0.101 overload
!
ip access-list standard NATACL
permit 192.168.1.0 0.0.0.255
!
logging esm config
access-list 1 permit 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
!
!
!
!
!
control-plane
!
!
line con 0
no modem enable
line aux 0
line vty 0 4
login
transport input all
!
end

ChrisD. · 26 Jan 2015 at 11:12

I'm assuming your girlfriend is not using Sky as her IP?
You need the details.

traveyb · 26 Jan 2015 at 11:13

Nah she is on standard TalkTalk ADSL.
I just took it round without a config to see if I got carrier on it, which I did fine.

ChrisD. · 26 Jan 2015 at 11:14

In which case you need the MER details.

traveyb · 26 Jan 2015 at 11:23

So the router won't get a solid CD light until it's authenticated?
I have tried with a basic config (as posted above) but that didn't work either. I will try and get the login details via wireshark again however I would have thought you would need a carrier before authentication begins?

ChrisD. · 26 Jan 2015 at 11:30

I don't know, sorry, I just know that even if you got a line, your internet wouldn't work without the login details so it makes no odds.

BTW I recently got the login details for mine, and it was not as easy as the guides suggest, some people think Sky have changed the way it's done.

traveyb · 26 Jan 2015 at 11:51

I will try and fiddle some more, going to take a standard 877W home tonight and see if that gets a carrier.
I just got mine via wireshark using DHCP filtering, is this what you done?

ChrisD. · 26 Jan 2015 at 11:53

Yes, but it took me 4 hours.

traveyb · 26 Jan 2015 at 12:01

Ouch, did you use this method?
https://www.youtube.com/watch?v=BdcsmYX7eEQ

ChrisD. · 26 Jan 2015 at 12:20

Yes, and I followed the PDF and couldn't get the details. Others have had the same, raising suspicion that Sky have changed something.

Never the less, I got it in the end.

Half wishing I'd have chosen Zen, same price for the 80/20 package.

pdw8 · 26 Jan 2015 at 21:10

I use 887va on a daily basis at work.

Can you do a "show controllers vdsl 0" output please

If the router detects DSL (the CD carrier detect) light will come on regardless of authentication. Once it gets DSL sync it goes through the authentication and once accepted the PPP light will come on.
On the BT lines I mostly use its just the dialer interface details but I don't know about the Sky residential process

traveyb · 26 Jan 2015 at 21:45

Thanks for the replys. I plugged the router in again to try some bits when I got home and it worked first time (I swear I hate the variables you get in IT!).
Connected first time with my config (Sky are a pita).
Would love to know what caused the issue but hey it's working now!

Xez · 26 Jan 2015 at 22:41

VDSL on an 877 is pointless as the throughput is utterly dire! Even the 887's can only just handle up to 40Mbps with no ACL's in place. Interesting to see one being used really!

Edit - Config says 880 series so presuming typo and that you are actually using an 887, didn't think the 877's supported VDSL until the very lest iteration.

traveyb · 27 Jan 2015 at 03:39

Yeah my bad, it's a 887VA.
The only thing i've noticed so far is that it's syncing quite low. I was getting about 37/7 and now 26/0.7

The controller is showing the low sync too:

Modem Status: TC Sync (Showtime!)
DSL Config Mode: AUTO
Trained Mode: G.993.2 (VDSL2) Profile 17a
TC Mode: PTM
Selftest Result: 0x00
DELT configuration: disabled
DELT state: not running
Trellis: ON ON
SRA: disabled disabled
SRA count: 0 0
Bit swap: enabled enabled
Bit swap count: 5123 1
Line Attenuation: 0.0 dB 0.0 dB
Signal Attenuation: 0.0 dB 0.0 dB
Noise Margin: 5.9 dB 5.7 dB
Attainable Rate: 45144 kbits/s 941 kbits/s
Actual Power: 12.0 dBm 10.5 dBm
Per Band Status: D1 D2 D3 U0 U1 U2 U3
Line Attenuation(dB): 16.9 45.8 70.1 19.2 N/A N/A N/A
Signal Attenuation(dB): 16.9 45.8 70.1 19.2 N/A N/A N/A
Noise Margin(dB): 5.9 5.9 5.8 5.7 N/A N/A N/A
Total FECC: 256100 64449
Total ES: 1 0
Total SES: 0 0
Total LOSS: 0 0
Total UAS: 32 32
Total LPRS: 0 0
Total LOFS: 0 0
Total LOLS: 0 0

Full inits: 1
Failed full inits: 0
Short inits: 0
Failed short inits: 0

Firmware Source File Name (version)
-------- ------ -------------------
VDSL user config flash:vdsl.bin (10)

Modem FW Version: 110802_1752-4.02L.03.A2pv6C035d.d23j
Modem PHY Version: A2pv6C035d.d23j
Vendor Version:

DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 36207 0 786
SRA Previous Speed: 0 0 0 0
Previous Speed: 0 0 0 0
Reed-Solomon EC: 0 256100 0 64501
CRC Errors: 0 2 0 0
Header Errors: 0 0 0 0
Interleave (ms): 0.00 16.00 0.00 7.00
Actual INP: 0.00 8.00 0.00 4.00

Training Log : Stopped
Training Log Filename : flash:vdsllog.bin