ATM QoS on 877
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Posted by HangaS on April 29, 2008, 12:28 pm
Please log in for more thread options I'm having a bit of trouble in getting the full bandwith on an IPoATM connecion ( ADSL w/ LLC encapsulation) I've setup the ATM0 interface and bridged it to the BVI1 interface. So far so good. Got a lan configured also and NAT is doing ok. However I'm getting a much lower bandwith then with the ISP supplied modem. With the Thompson SpeedTouch modem I can transfer @ about 720KBs but with the 877 I can't pass the 320KBs Called the ISP support, who said that the 877 was not a supported equipment, but they gave me some usefull(?) info. The guy said: PCR: 4000 SCR: 4000 QoS type UBR MBS: 10 I read a bit about this and I now I have minimal understanding how this affects speed in a link. My troube now is how to tell te 877 to use these values. The only way I found to specify the pcr and scr was trough the vbr-nrt command on the config-if-atm-vc this is where I got stuck #vbr-nrt 4000 4000 10 should do it, right? but the maximum value I can use is 747 c877(config-if-atm-vc)#vbr-nrt ? <32-747> Peak Cell Rate(PCR) in Kbps
this rate limit also apears on ubr and ubr+ and can be checked on the interface c877#show int atm0 ATM0 is up, line protocol is up Hardware is MPC ATMSAR (with Alcatel ADSL Module) Description: --- ADSL to ISP --- MTU 4470 bytes, sub MTU 4470, BW 747 Kbit, DLY 490 usec, reliability 255/255, txload 1/255, rxload 1/255 Then I tried a different approach, to set-up a vc-class in global config and tried to apply it to the pvc, but this is what i got c877(config)#int atm0 c877(config-if)#pvc 0/35 c877(config-if-atm-vc)#class-vc vdf Insufficient bandwidth on interface or invalid PCR. Available bandwidth = 747 I guess this is the way, cos when I reduce the rate to, let's say 100, the download speed drops to about 40KBs right away. How can solve this? How can I raise the "Available bandwidth" value? Thanks | |||||||||||||||||||||||||
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Posted by Merv on April 29, 2008, 5:51 pm
Please log in for more thread options > Hi,
> > I'm having a bit of trouble in getting the full bandwith on an IPoATM > connecion ( ADSL w/ LLC encapsulation) > > I've setup the ATM0 interface and bridged it to the BVI1 interface. > So far so good. > Got a lan configured also and NAT is doing ok. > > However I'm getting a much lower bandwith then with the ISP supplied > modem. > With the Thompson SpeedTouch modem I can transfer @ about 720KBs but > with the 877 I can't pass the 320KBs > > Called the ISP support, who said that the 877 was not a supported > equipment, but they gave me some usefull(?) info. > > The guy said: > > PCR: 4000 > SCR: 4000 > QoS type UBR > MBS: 10 > > I read a bit about this and I now I have minimal understanding how > this affects speed in a link. My troube now is how to tell te 877 to > use these values. > > The only way I found to specify the pcr and scr was trough the vbr-nrt > command on the config-if-atm-vc > this is where I got stuck > > #vbr-nrt 4000 4000 10 should do it, right? but the maximum value I > can use is 747 > > c877(config-if-atm-vc)#vbr-nrt ? > <32-747> Peak Cell Rate(PCR) in Kbps > > this rate limit also apears on ubr and ubr+ > > and can be checked on the interface > > c877#show int atm0 > ATM0 is up, line protocol is up > Hardware is MPC ATMSAR (with Alcatel ADSL Module) > Description: --- ADSL to ISP --- > MTU 4470 bytes, sub MTU 4470, BW 747 Kbit, DLY 490 usec, > reliability 255/255, txload 1/255, rxload 1/255 > > Then I tried a different approach, to set-up a vc-class in global > config and tried to apply it > to the pvc, but this is what i got > > c877(config)#int atm0 > c877(config-if)#pvc 0/35 > c877(config-if-atm-vc)#class-vc vdf > Insufficient bandwidth on interface or invalid PCR. Available > bandwidth = 747 > > I guess this is the way, cos when I reduce the rate to, let's say 100, > the download speed drops to about 40KBs right away. > > How can solve this? How can I raise the "Available bandwidth" value? > > Thanks If you search this newsgroup you will find lots of references for similiar issue. The frist step to verify that you have the latest ADSL firmware loaded onto your router. | |||||||||||||||||||||||||
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Posted by HangaS on April 30, 2008, 1:16 pm
Please log in for more thread options I did a few searches before I post,
but I guess I ruled out the firmware version issue cos the router is brand new with a recent manufacture date. I don't have it in front of me 'till monday, nor I remember the IOS version atm. I just now it has Advanced IP services option. I was pretty convinced it was some ATM configuration issue I was missing, but I'll check the ADSL firmware issue as soon as I can. Thanks > If =A0you search this newsgroup you will find lots of references for
> similiar issue. > > The frist step to verify that you have the latest ADSL firmware loaded > onto your router.- Hide quoted text - > > - Show quoted text - | |||||||||||||||||||||||||
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Posted by Merv on April 30, 2008, 1:53 pm
Please log in for more thread options > I did a few searches before I post,
> but I guess I ruled out the firmware version issue cos the router is > brand new with a recent manufacture date. > > I don't have it in front of me 'till monday, nor I remember the IOS > version atm. > I just now it has Advanced IP services option. > > I was pretty convinced it was some ATM configuration issue I was > missing, but I'll check the ADSL firmware > issue as soon as I can. Post the output of show version as that info will be helpful for responders Also output of show dsl int atm 0 | |||||||||||||||||||||||||
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Posted by HangaS on May 5, 2008, 5:22 am
Please log in for more thread options >
> > I did a few searches before I post,
> > but I guess I ruled out the firmware version issue cos the router is > > brand new with a recent manufacture date. >
> > I don't have it in front of me 'till monday, nor I remember the IOS
> > version atm. > > I just now it has Advanced IP services option. >
> > I was pretty convinced it was some ATM configuration issue I was
> > missing, but I'll check the ADSL firmware > > issue as soon as I can. >
> Post the output of show version as that info will be helpful for > responders > > Also output of show dsl int atm 0 Hi, I only now got the oportunity to get back to this and check the version of the ADSL firmware. Looks like I'm running a pretty old version, despite the router is brand new and manufactured in 11-Jan-08. I'll try with 3.0.10 as it is the latest available on ftp://ftp.cisco.com/pu= b/access/800 to see how it goes. Thanks c877#show version Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(6)T9, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2007 by Cisco Systems, Inc. Compiled Tue 09-Oct-07 18:56 by khuie ROM: System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE c877#show dsl int atm 0 ATM0 Alcatel 20190 chipset information ATU-R (DS) ATU-C (US) Modem Status: Showtime (DMTDSL_SHOWTIME) DSL Mode: ITU G.992.5 (ADSL2+) Annex A ITU STD NUM: 0x03 0x2 Chip Vendor ID: 'STMI' 'BDCM' Chip Vendor Specific: 0x0000 0x918F Chip Vendor Country: 0x0F 0xB5 Modem Vendor ID: 'CSCO' ' ' Modem Vendor Specific: 0x0000 0x0000 Modem Vendor Country: 0xB5 0x00 Serial Number Near: FHK1202252L Serial Number Far: Modem Version Near: 12.4(6)T9 Modem Version Far: Capacity Used: 49% 100% Noise Margin: 19.0 dB 10.5 dB Output Power: 19.5 dBm 12.0 dBm Attenuation: 54.0 dB 20.0 dB Defect Status: None None Last Fail Code: None Watchdog Counter: 0x88 Watchdog Resets: 0 Selftest Result: 0x00 Subfunction: 0x00 Interrupts: 22976 (0 spurious) PHY Access Err: 0 Activations: 1 LED Status: ON LED On Time: 100 LED Off Time: 100 Init FW: embedded Operation FW: embedded FW Version: 2.5.42 DS Channel1 DS Channel0 US Channel1 US Channel0 Speed (kbps): 0 3061 0 747 Cells: 0 0 0 114975 Reed-Solomon EC: 0 0 0 0 CRC Errors: 0 0 0 0 Header Errors: 0 0 0 0 Total BER: 0E-0 0E-0 Leakage Avarage BER: 0E-0 0E-0 Interleave Delay: 0 4 0 4 LOM Monitoring : Disabled DMT Bits Per Bin 000: 0 0 0 0 0 0 0 6 9 A A B B C C C 010: C C C C C C C C B B B B A A A A 020: 0 2 2 4 5 5 5 6 6 6 5 5 5 5 6 5 030: 5 5 5 7 7 8 8 8 8 8 8 8 8 8 2 7 040: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 050: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 060: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 070: 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 6 080: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 090: 5 5 2 4 5 5 5 5 5 5 5 5 5 5 5 5 0A0: 5 5 5 5 5 5 5 5 5 5 5 4 5 5 5 5 0B0: 4 4 4 4 4 4 4 4 4 4 4 5 5 4 4 4 0C0: 4 4 4 4 4 4 4 4 4 4 4 4 4 4 2 4 0D0: 4 4 2 2 4 4 4 4 4 4 4 4 4 4 2 2 0E0: 2 2 0 0 0 2 2 2 2 2 2 2 2 2 2 2 0F0: 2 2 2 2 2 2 4 2 2 2 4 4 2 4 2 4 100: 2 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 110: 2 2 2 2 2 2 2 2 2 2 2 2 2 2 0 2 120: 2 2 0 2 2 2 0 0 0 0 0 0 0 0 0 0 130: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 140: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 150: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 160: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 170: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 180: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 190: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1A0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1B0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1D0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1E0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DSL: Training log buffer capability is not enabled | |||||||||||||||||||||||||
