Interface Interpretation

[Carlton Patterson]

Hello Community,

Can someone please explain why the BW on Dialer1 is 56 Kbit/Sec, while the Virtual-Access2 (that the Dialer 1 is bound to) has a BW of 448 kbit/s?

uk01340-rm01-ald#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

uk01340-rm01-ald(config)#end

uk01340-rm01-ald#show int dial 1

Dialer1 is up, line protocol is up (spoofing)

  Hardware is Unknown

  Internet address is 80.229.xxx.xx/30

  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 255/255, rxload 255/255

  Encapsulation PPP, LCP Closed, loopback not set

  Keepalive set (10 sec)

  DTR is pulsed for 1 seconds on reset

  Interface is bound to Vi2

  Last input never, output never, output hang never

  Last clearing of "show interface" counters 2d23h

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: weighted fair

  Output queue: 0/1000/64/0 (size/max total/threshold/drops)

     Conversations  0/0/16 (active/max active/max total)

     Reserved Conversations 0/0 (allocated/max allocated)

     Available Bandwidth 42 kilobits/sec

  5 minute input rate 672000 bits/sec, 91 packets/sec

  5 minute output rate 358000 bits/sec, 62 packets/sec

     11406560 packets input, 1877304168 bytes

     9925735 packets output, 18446744072806663030 bytes

Bound to:

Virtual-Access2 is up, line protocol is up

  Hardware is Virtual Access interface

  MTU 1500 bytes, BW 448 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 216/255, rxload 255/255

  Encapsulation PPP, LCP Open

  Open: IPCP

  PPPoATM vaccess, cloned from Dialer1

  Vaccess status 0x44

  Bound to ATM0/1/0 VCD: 1, VPI: 0, VCI: 38, loopback not set

  Keepalive set (10 sec)

  DTR is pulsed for 5 seconds on reset

  Interface is bound to Di1 (Encapsulation PPP)

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters 2d23h

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 672000 bits/sec, 92 packets/sec

  5 minute output rate 380000 bits/sec, 89 packets/sec

     11429126 packets input, 1875972366 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     9925741 packets output, 3392079954 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

And if I were to monitor the interface, should I monitor the Dialer 1 interface or the Virtual-Access 2 interface?

Cheers

Carlton

[Richard Burts]

Carlton

I do not have an authoritative answer, but here is what makes sense to me. Both interfaces are virtual interfaces and therefore do not have any physical implementation from which a realistic and accurate bandwidth can be determined. So Cisco must make a choice about what to use for the interface bandwidth. Dialer interfaces have been around a long time and in their beginning were closely associated with ISDN. So the choice of 56K is appropriate for them. The virtual access interface is much more recent and is not so much associated with any physical interface. So Cisco has chosen a higher value for the bandwidth, which is in keeping with the tendency to use higher and higher capacity media in our networks.

HTH

Rick

[Leo Laohoo]

What is the exact model of this router?

If this is a xDSL router, issue the command "sh atm dsl".

[Carlton Patterson]

Leo,

Sorry for the delayed response.

Please find the information as requested:

uk01340-rm01-ald#show version

Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2012 by Cisco Systems, Inc.

Compiled Tue 20-Mar-12 17:58 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M15, RELEASE SOFTWARE (fc1)

uk01340-rm01-ald uptime is 5 days, 19 hours, 46 minutes

System returned to ROM by power-on

System restarted at 15:52:45 BST Fri Sep 13 2013

System image file is "usbflash0:c1900-universalk9-mz.SPA.151-4.M4.bin"

Last reload type: Normal Reload

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco CISCO1921/K9 (revision 1.0) with 487424K/36864K bytes of memory.

Processor board ID FTX16378390

1 DSL controller

1 Ethernet interface

2 Gigabit Ethernet interfaces

1 ATM interface

1 terminal line

1 Virtual Private Network (VPN) Module

DRAM configuration is 64 bits wide with parity disabled.

255K bytes of non-volatile configuration memory.

249840K bytes of USB Flash usbflash0 (Read/Write)

uk01340-rm01-ald#show atm interface atM 0/1/0

Interface ATM0/1/0:

AAL enabled:  AAL5,, Maximum VCs: 4, Current VCCs: 1

VCIs per VPI: 1024,

Max. Datagram Size: 1658

PLIM Type: ADSL - 448Kbps Upstream, DMT, TX clocking: LINE

146173 input, 216668 output, 14275586 IN fast, 11353720 OUT fast

Avail bw = 448

Config. is ACTIVE

uk01340-rm01-ald#

Cheers

[Leo Laohoo]

uk01340-rm01-ald#show atm interface atM 0/1/0

Errrr ... That's not the command I was asking.  What is the output to the command "sh atm dsl"?  This output will tell you your sychronized speed with your ISP.

[Carlton Patterson]

Hi Leo

I don't have that option:

uk01340-rm01-ald#show atm ? 

  acircuit            ATM Attachment circuit information

  arp-server          ATM ARP Server Table

  async               Display ATM Async Interface Information

  bundle              ATM bundle information

  capabilities        ATM capabilities

  cell-packing        ATM cell-packing information

  class-links         ATM vc-class links

  ilmi-configuration  Display Top level ILMI

  ilmi-status         Display ATM Interface ILMI information

  interface           Interfaces and ATM information

  map                 ATM static mapping

  oam                 ATM oam

  pvc                 ATM PVC information

  traffic             ATM statistics

  vc                  ATM VC information

  vlan                Display VLAN to PVC bindings

  vp                  ATM VP information

Carlton

[Leo Laohoo]

Or was it "sh DSL ATM".

Sent from Cisco Technical Support Nintendo App

[acampbell]

Hi,

Try

show controller vdsl

Regards,
Alex.
Please rate useful posts.

[paolo bevilacqua]

Wrong forum, post in "WAN and routing". You can move your posting with the Actions panel on the right.