Cisco 1941 with EHWIC-VA-DSL-M - Revision history

Pio2pio: /* SNR and Line Attenuation */

2014-07-08T08:13:00Z

SNR and Line Attenuation

← Older revision		Revision as of 10:13, 8 July 2014
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	;Output Power		;Output Power
	How much power modem (upstream) or DSLAM (downstream) is using. Maximum recommended is about 15dB. The lower the power the better for this measurement.		How much power modem (upstream) or DSLAM (downstream) is using. Maximum recommended is about 15dB. The lower the power the better for this measurement.

			DSL routers, in addition to the '''actual <span style="color: blue">SNR</span>''', may define '''signal-to-noise margin (<span style="color: blue">SNR</span> margin)''' as the difference between the actual <span style="color: blue">SNR</span>and the <span style="color: blue">SNR</span>required to sync at a specific speed. For example:

			:actual <span style="color: blue">SNR</span> = 44dB
			:<span style="color: blue">SNR</span> to sync at 8Mbit/s = 35dB
			:<span style="color: blue">SNR</span> margin = 44-35= 9dB

			As with actual <span style="color: blue">SNR</span>, the higher that <span style="color: blue">SNR</span>margin number, the better and above 6dB is acceptable.

	== SNR Adjustment for Stability ==		== SNR Adjustment for Stability ==

Pio2pio: /* Cacti logging */

2014-07-08T08:09:58Z

Cacti logging

← Older revision		Revision as of 10:09, 8 July 2014
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	*[http://nwsmith.blogspot.co.uk/2009/06/using-snmp-with-cisco-router-to.html Using SNMP with a Cisco router to troubleshoot & diagnose ADSL problems]		*[http://nwsmith.blogspot.co.uk/2009/06/using-snmp-with-cisco-router-to.html Using SNMP with a Cisco router to troubleshoot & diagnose ADSL problems]

			== Interleaving ==
			When a customer is put on a "Noise Profile" usually their DSL line is changed from FastPath to Interleaved.

			'''Interleaving''' is an error correction protocol that is implemented for your line at the DSLAM. With Interleaving enabled, the DSLAM can correct errors in the data stream it receives before passing that data to your gateway router. It is usually implemented on noisy or marginal lines and can greatly increase sync stability and effectively eliminate "first hop" packet loss. The largest drawback to Interleaving is that it will increase your ping time, specifically to your first hop gateway router.

			If Interleaving is not enabled on your line, it is configured as FastPath. '''FastPath allows''' the DSLAM to pass the data received from you to the first hop router without performing any error correction. As a result, marginal lines could experience an increase in packet loss and decrease in sync stability (i.e. frequent sync loss). However, FastPath has lower ping times, especially to the first hop router.

			'''show controllers vDSL 0/0/0'''
			Controller VDSL 0/0/0 is UP

			Daemon Status: Up

			XTU-R (DS) XTU-C (US)
			Chip Vendor ID: 'BDCM' 'IFTN'
			Chip Vendor Specific: 0x0000 0x71C8
			<-- output ommitted -->
			Bit swap count: 3348 15
			Line Attenuation: 55.5 dB 25.8 dB
			Signal Attenuation: 61.5 dB 26.0 dB
			Noise Margin: 3.1 dB 6.7 dB
			Attainable Rate: 4840 kbits/s 896 kbits/s
			Actual Power: 0.0 dBm 12.8 dBm
			Total FECC: 552456 33948
			<-- output ommitted -->
			DS Channel1 DS Channel0 US Channel1 US Channel0
			Speed (kbps): 0 4046 0 876
			SRA Previous Speed: 0 0 0 0
			Previous Speed: 0 4331 0 895
			Total Cells: 0 546032971 0 117935394
			User Cells: 0 135787856 0 35293248
			Reed-Solomon EC: 0 57489 0 508
			CRC Errors: 0 4950 0 2483
			Header Errors: 0 725 0 72
			'''<span style="color: green">Interleave (ms): 0.00 7.97 0.00 5.93</span>'''
			Actual INP: 0.00 1.16 0.00 0.41
			<-- output ommitted -->

			''Friendly Advice/Time Saver: Even though you may (after a large amount of effort) be able to call the Helpdesk and get switched to Fastpath, there's usually a reason you are interleaved, so you may or may not be able to connect without it. Typically, the system will automatically switch back to interleaved after a short time anyway. ''

	=References=		=References=

Pio2pio at 19:18, 8 June 2014

2014-06-08T19:18:50Z

← Older revision		Revision as of 21:18, 8 June 2014
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	If you have a static IP address, you should enter the following DNS server address:		If you have a static IP address, you should enter the following DNS server address:
	Primary DNS server: 87.194.255.154		Primary DNS server: 87.194.255.154
	My o2 box MAC address: 00-24-17-80-42-d0		My o2 box MAC address: 00-24-17-11-22-33

	;A BVI (Bridged Virtual Interface)		;A BVI (Bridged Virtual Interface)
Line 196:		Line 196:
	interface BVI1		interface BVI1
	! o2 box's cloned mac address in case it's the only allowed to connect to ISP's DSLAM		! o2 box's cloned mac address in case it's the only allowed to connect to ISP's DSLAM
	mac-address 0024.~~1780~~.~~42d0~~		mac-address 0024.1711.2233
	ip address 10.0.0.1 255.0.0.0		ip address 10.0.0.1 255.0.0.0
	ip nat inside		ip nat inside

Pio2pio: /* Product codding */

2014-06-08T19:16:25Z

Product codding

← Older revision		Revision as of 21:16, 8 June 2014
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	#show inventory		#show inventory
	NAME: "CISCO1941/K9", DESCR: "CISCO1941/K9 chassis, Hw Serial#: ~~FCZ12233DJE~~, Hw Revision: 1.0"		NAME: "CISCO1941/K9", DESCR: "CISCO1941/K9 chassis, Hw Serial#: FCZ012345JE, Hw Revision: 1.0"
	PID: CISCO1941/K9 , VID: V05 , SN: ***********		PID: CISCO1941/K9 , VID: V05 , SN: ***********
	NAME: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2 on Slot 0 SubSlot 1", DESCR: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2"		NAME: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2 on Slot 0 SubSlot 1", DESCR: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2"

Pio2pio at 19:13, 8 June 2014

2014-06-08T19:13:51Z

← Older revision		Revision as of 21:13, 8 June 2014
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	;Current platform info at the boot		;Current platform info at the boot
	Cisco CISCO1941/K9 (revision 1.0) with 487424K/36864K bytes of memory.		Cisco CISCO1941/K9 (revision 1.0) with 487424K/36864K bytes of memory.
	Processor board ID ~~FCZ12233DJE~~		Processor board ID FCZ012345JE
	1 DSL controller		1 DSL controller
	1 Ethernet interface		1 Ethernet interface
Line 468:		Line 468:
	Modem Vendor Specific: 0x4602 0x0000		Modem Vendor Specific: 0x4602 0x0000
	Modem Vendor Country: 0xB500 0x0000		Modem Vendor Country: 0xB500 0x0000
	Serial Number Near: ~~FOC17070AWM~~ 1941/K9 15.2(4)M		Serial Number Near: FOC012345WM 1941/K9 15.2(4)M
	Serial Number Far:		Serial Number Far:
	Modem Version Near: 15.2(4)M		Modem Version Near: 15.2(4)M

Pio2pio at 12:04, 6 June 2014

2014-06-06T12:04:53Z

← Older revision		Revision as of 14:04, 6 June 2014
Line 14:		Line 14:

	#show inventory		#show inventory
	NAME: "CISCO1941/K9", DESCR: "CISCO1941/K9 chassis, Hw Serial#: ~~FCZ1727C5JE~~, Hw Revision: 1.0"		NAME: "CISCO1941/K9", DESCR: "CISCO1941/K9 chassis, Hw Serial#: FCZ12233DJE, Hw Revision: 1.0"
	PID: CISCO1941/K9 , VID: V05 , SN: ***********		PID: CISCO1941/K9 , VID: V05 , SN: ***********
	NAME: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2 on Slot 0 SubSlot 1", DESCR: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2"		NAME: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2 on Slot 0 SubSlot 1", DESCR: "ADSL/VDSL over POTS Annex M supporting ADSL1, ADSL2, ADSL2+ and VDSL2"
Line 21:		Line 21:
	;Current platform info at the boot		;Current platform info at the boot
	Cisco CISCO1941/K9 (revision 1.0) with 487424K/36864K bytes of memory.		Cisco CISCO1941/K9 (revision 1.0) with 487424K/36864K bytes of memory.
	Processor board ID ~~FCZ1727C5JE~~		Processor board ID FCZ12233DJE
	1 DSL controller		1 DSL controller
	1 Ethernet interface		1 Ethernet interface

Pio2pio: /* SNR and Line Attenuation */

2014-01-19T20:55:42Z

SNR and Line Attenuation

← Older revision		Revision as of 22:55, 19 January 2014
Line 562:		Line 562:
	== SNR and Line Attenuation ==		== SNR and Line Attenuation ==
	;SNR is Signal to Noise Ratio ** (aka Noise Margin or Signal to Noise Margin)		;SNR is Signal to Noise Ratio ** (aka Noise Margin or Signal to Noise Margin)
	Relative strength of the DSL signal to Noise ratio. 6dB is the lowest dB manufactures specify for modem to be able to synch. In some instances interleaving can help raise the noise margin to an acceptable level. The higher the number the better for this measurement		Relative strength of the DSL signal to Noise ratio. 6dB is the lowest dB manufactures specify for modem to be able to synch. In some instances interleaving can help raise the noise margin to an acceptable level. The higher the number the better for this measurement. The lower the SNR, the louder noise is on your line in comparison to the ADSL signal, so higher SNR is always better. Low SNR doesnt always mean low speed, more often than not it causes reliability issues, but depending on just how bad the noise is, it can eat away at subcarriers, which will lower your overall speed
	*6dB or below is bad and will experience no synch or intermittent synch problems		*6dB or below is bad and will experience no synch or intermittent synch problems
	*7dB-10dB is fair but does not leave much room for variances in conditions		*7dB-10dB is fair but does not leave much room for variances in conditions

Pio2pio: /* BT Infinity */

2014-01-19T10:23:56Z

BT Infinity

← Older revision		Revision as of 12:23, 19 January 2014
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	=== BT Infinity ===		=== BT Infinity ===
	It usually the same connection to DSLAM but it uses different encapsulation. Therefore a dialer interface configuration it's similar to ADSL config.		It usually the same connection to DSLAM but it uses different encapsulation. Therefore a dialer interface configuration it's similar to ADSL config.
	*~~VPI number~~: ~~0 (not confirmed)~~		*VLAN: 101
	*~~VCI number~~: ~~38 (not confirmed)~~		*VLAN encapsulation: dot1q
	*Authentication: CHAP (not confirmed)		*Authentication: CHAP (not confirmed)
	*Modulation: (not confirmed)		*Modulation: (not confirmed)

Pio2pio: /* BT Infinity */

2014-01-19T10:03:39Z

BT Infinity

@@ Line 330: / Line 330: @@
 *Encapsulation: PPP over Ethernet(PPPoE); Virtual Circuit Multiplexing (VC-MUX) (not confirmed)
 *Multiplexing: VC-based or VC Mux (not confirmed)
+ interface Dialer0
   interface ATM0/0/0
    no ip address

Pio2pio: /* BT ADSL2+ */

2014-01-19T09:59:24Z

BT ADSL2+

@@ Line 322: / Line 322: @@
   access-list 1 permit 10.0.0.0 0.0.255.255
   dialer-list 1 protocol ip permit
 = Troubleshooting =