RE: QOS on 2621xm [7:61353]
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Nope, The only engineering you can do is at the cpe, where your traffic goes out and comes in. Thais makes that you at best can configure QOS at the BOTTLENECK, that may be your remote office router. If not applicable, than the agregation point (HQ) will be the next best. I still would say that you carefully analyse the traffic patterns and look at the bottlenecks. That is the no 1 point to do business. Martijn - -Oorspronkelijk bericht- Van: Julian Pentermann [mailto:[EMAIL PROTECTED]] Verzonden: dinsdag 21 januari 2003 6:58 Aan: mjans001 Onderwerp: Re: QOS on 2621xm [7:61353] would the isp have to do anything or would i just impliment the qos on my router? Thanks for the help - - Original Message - From: mjans001 Newsgroups: groupstudy.cisco Sent: Tuesday, January 21, 2003 12:53 AM Subject: RE: QOS on 2621xm [7:61353] -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 You may need to use Priority Queueing, and hardcode telnet High prio based on an access-list. Normal traffic despools after telnet queue is empty. If you are sure that there will always be bandwitfh left for other traffic, PQ will do fine. That is one way of using it. During transmission, PQ gives priority queues absolute preferential treatment over low priority queues; important traffic, given the highest priority, always takes precedence over less important traffic. Packets are classified based on user-specified criteria and placed into one of the four output queues-high, medium, normal, and low-based on the assigned priority. Packets that are not classified by priority fall into the normal queue. Figure 7 illustrates this process. Congestion Management Overview http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c /qcpart2/qcconman.htm Why Use Priority Queueing? PQ provides absolute preferential treatment to high priority traffic, ensuring that mission-critical traffic traversing various WAN links gets priority treatment. In addition, PQ provides a faster response time than do other methods of queueing. Although you can enable priority output queueing for any interface, it is best used for low-bandwidth, congested serial interfaces. Considerations When choosing to use PQ, consider that because lower priority traffic is often denied bandwidth in favor of higher priority traffic, use of PQ could, in the worst case, result in lower priority traffic never being transmitted. To avoid inflicting these conditions on lower priority traffic, you can use traffic shaping or CAR to rate-limit the higher priority traffic. PQ introduces extra overhead that is acceptable for slow interfaces, but may not be acceptable for higher speed interfaces such as Ethernet. With PQ enabled, the system takes longer to switch packets because the packets are classified by the processor card. PQ uses a static configuration and does not adapt to changing network conditions. Martijn - -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Namens Julian P Verzonden: maandag 20 januari 2003 9:02 Aan: [EMAIL PROTECTED] Onderwerp: QOS on 2621xm [7:61353] Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Version: PGP 8.0 iQA/AwUBPix7Bndq56XWk+VyEQJ+/ACfS2LZO44i+6Y+cRg37a/ApiovJtgAoLvz kS6ZvDnOtSXEqAAi/6u1v+p4 =nXJB -END PGP SIGNATURE- Version: PGP 8.0 iQA/AwUBPi2VbHdq56XWk+VyEQIPOQCfTguOnPMduMdxWbRuzbadddit3esAn3/6 vmrK61ZimecTbrS2DXPX3Jwo =FsQK -END PGP SIGNATURE- Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61482t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
QOS on 2621xm [7:61353]
Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61353t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: QOS on 2621xm [7:61353]
You will need to QoS on both sides of the link. Your side should be fine, but good luck with the ISP side. I would use the diffserve bits as well as bandwidth allocation using policy maps. Andrew -Original Message- From: Julian P [mailto:[EMAIL PROTECTED]] Sent: 20 January 2003 10:02 To: [EMAIL PROTECTED] Subject: QOS on 2621xm [7:61353] Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61357t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: QOS on 2621xm [7:61353]
In QoS now, there is more than just setting the bandwidth allocated to each class. What you need to do is combine this with the diffserv bit. This is basically the newer version of the TOS bit in the IP header that defines what sort of service happens to the packet. In a nut shell, this means which packets gets sent first in the output queue. As telnet is very delay sensitive, you should give it a higher diffserv bit. What you basically do is create class maps for each traffic type and apply it to the Ethernet interface so that the router modifies the packets as it enters the router. As the packet leaves the interface, you use normal service policies. Sample config below: class-map match-all Gold match access-group 170 class-map match-all Bronze match access-group 172 class-map match-all Telnet_SSH match access-group 131 class-map match-all Silver match access-group 171 ! policy-map SET_DIFFSERV class Telnet_SSH set ip dscp cs5 policy-map class Gold bandwidth percent (%) class Bronze bandwidth percent (%) ! interface FastEthernet0/0 description Link to LAN ip address x.x.x.x y.y.y.y speed 100 full-duplex service-policy input SET_DIFFSERV ! interface Serial0/0 bandwidth 512 ip address a.a.a.a b.b.b.b service-policy output access-list 131 remark Prioritise Telnet and SSH access-list 131 permit tcp any any eq telnet access-list 131 permit tcp any any eq 22 access-list 170 remark Gold Class QoS access-list 170 permit ip host xx host xxx access-list 170 permit ip host xxx host xxx access-list 170 permit tcp host eq 443 any access-list 170 permit tcp host eq www any access-list 170 permit udp any any eq domain access-list 172 remark Bronze Class QoS access-list 172 permit ip host host x -Original Message- From: Julian P [mailto:[EMAIL PROTECTED]] Sent: 20 January 2003 10:02 To: [EMAIL PROTECTED] Subject: QOS on 2621xm [7:61353] Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61365t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: QOS on 2621xm [7:61353]
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 You may need to use Priority Queueing, and hardcode telnet High prio based on an access-list. Normal traffic despools after telnet queue is empty. If you are sure that there will always be bandwitfh left for other traffic, PQ will do fine. That is one way of using it. During transmission, PQ gives priority queues absolute preferential treatment over low priority queues; important traffic, given the highest priority, always takes precedence over less important traffic. Packets are classified based on user-specified criteria and placed into one of the four output queues-high, medium, normal, and low-based on the assigned priority. Packets that are not classified by priority fall into the normal queue. Figure 7 illustrates this process. Congestion Management Overview http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c/qcpart2/qcconman.htm Why Use Priority Queueing? PQ provides absolute preferential treatment to high priority traffic, ensuring that mission-critical traffic traversing various WAN links gets priority treatment. In addition, PQ provides a faster response time than do other methods of queueing. Although you can enable priority output queueing for any interface, it is best used for low-bandwidth, congested serial interfaces. Considerations When choosing to use PQ, consider that because lower priority traffic is often denied bandwidth in favor of higher priority traffic, use of PQ could, in the worst case, result in lower priority traffic never being transmitted. To avoid inflicting these conditions on lower priority traffic, you can use traffic shaping or CAR to rate-limit the higher priority traffic. PQ introduces extra overhead that is acceptable for slow interfaces, but may not be acceptable for higher speed interfaces such as Ethernet. With PQ enabled, the system takes longer to switch packets because the packets are classified by the processor card. PQ uses a static configuration and does not adapt to changing network conditions. Martijn - -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Namens Julian P Verzonden: maandag 20 januari 2003 9:02 Aan: [EMAIL PROTECTED] Onderwerp: QOS on 2621xm [7:61353] Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Version: PGP 8.0 iQA/AwUBPix7Bndq56XWk+VyEQJ+/ACfS2LZO44i+6Y+cRg37a/ApiovJtgAoLvz kS6ZvDnOtSXEqAAi/6u1v+p4 =nXJB -END PGP SIGNATURE- Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61420t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: QOS on 2621xm [7:61353]
What would he do if he had a FR link to a remote site and he wanted to ensure his high priority traffic was sent without DE, whilst low priority traffic can burst and be sent as DE - does FRTS (for Telnet only) solve this problem (if that can be done)? Rik -Original Message- From: mjans001 [mailto:[EMAIL PROTECTED]] Sent: Tuesday, 21 January 2003 6:54 AM To: [EMAIL PROTECTED] Subject: RE: QOS on 2621xm [7:61353] -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 You may need to use Priority Queueing, and hardcode telnet High prio based on an access-list. Normal traffic despools after telnet queue is empty. If you are sure that there will always be bandwitfh left for other traffic, PQ will do fine. That is one way of using it. During transmission, PQ gives priority queues absolute preferential treatment over low priority queues; important traffic, given the highest priority, always takes precedence over less important traffic. Packets are classified based on user-specified criteria and placed into one of the four output queues-high, medium, normal, and low-based on the assigned priority. Packets that are not classified by priority fall into the normal queue. Figure 7 illustrates this process. Congestion Management Overview http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c /qcpart2/qcconman.htm Why Use Priority Queueing? PQ provides absolute preferential treatment to high priority traffic, ensuring that mission-critical traffic traversing various WAN links gets priority treatment. In addition, PQ provides a faster response time than do other methods of queueing. Although you can enable priority output queueing for any interface, it is best used for low-bandwidth, congested serial interfaces. Considerations When choosing to use PQ, consider that because lower priority traffic is often denied bandwidth in favor of higher priority traffic, use of PQ could, in the worst case, result in lower priority traffic never being transmitted. To avoid inflicting these conditions on lower priority traffic, you can use traffic shaping or CAR to rate-limit the higher priority traffic. PQ introduces extra overhead that is acceptable for slow interfaces, but may not be acceptable for higher speed interfaces such as Ethernet. With PQ enabled, the system takes longer to switch packets because the packets are classified by the processor card. PQ uses a static configuration and does not adapt to changing network conditions. Martijn - -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Namens Julian P Verzonden: maandag 20 januari 2003 9:02 Aan: [EMAIL PROTECTED] Onderwerp: QOS on 2621xm [7:61353] Hi We would like to prioritize incoming traffic on our 256k internet link to uunet .We need to give telnet at least 64k incoming bandwidth. Any ideas on the best way to do this ? Thanks in advance Julian Version: PGP 8.0 iQA/AwUBPix7Bndq56XWk+VyEQJ+/ACfS2LZO44i+6Y+cRg37a/ApiovJtgAoLvz kS6ZvDnOtSXEqAAi/6u1v+p4 =nXJB -END PGP SIGNATURE- Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=61425t=61353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
