You need to know about QoS before going into the solution. Any traffic exiting the router gets into the interface's queue which is a hardware queue. QoS is done using software queue when there is congestion likely to happen in the hardware queue.
The following are the QoS mechanisms: Congestion Management Congestion Avoidance Link Efficiency Traffic shaping and policing Classifying traffic and allocating bandwidth is part Congestion Management. CBWFQ is the method we use for allocating BW. There are three software queues: - Priority Queue - Normal Queue - Default (FIFO) Priority queues are meant for delay sensitivity traffic like voice traffic. Usually DSCP value of EF or IP precedence value of 5 at layer 3 and CoS value of 5 at layer 2 is used for Priority queue classification. The Priority queue is given precedence over the normal queue and then the default queue. With regards Kings On Wed, Dec 22, 2010 at 2:39 PM, yusef sheriff <[email protected]> wrote: > Dear Kamran, > > Thanks for your quick responce. But the below question asked to do > prioritized and 25% of bandwidth. > > On R2, http and ssh traffic should both be *prioritized and given 25% of > interface bandwidth* on s0/0/0. > > and which solution is correct? should we use priority or bandwidth for > above question? > > > Regards, > Yusef Sherief > > On Wed, Dec 22, 2010 at 12:50 PM, Kamran Shakil > <[email protected]>wrote: > >> >> Dear Yousef, >> Priority is mostly used with delay sensitive traffic like video and voice >> , while bandwidth is used for data type of traffic for eg:- ssh , telnet , >> http etc..... >> >> sometypes you can use priority also if you have some transaction based >> traffic like SQL queries going live !!!! >> >> >> I think you might get similar answers from others ! >> >> >> good day . >> >> kamran. >> >> >> -----Original Message----- >> From: [email protected] on behalf of yusef >> sheriff >> Sent: Wed 12/22/2010 12:47 PM >> To: [email protected] >> Subject: [OSL | CCIE_Security] Advance security - MQC >> >> Dear All, >> >> I was doing advance security tab. i found the below question: >> >> On R2, http and ssh traffic should both be prioritized and given 25% of >> interface bandwidth on s0/0/0. >> >> my solution is:- >> R2(config)#class-map match-any PRIORITY >> R2(config-cmap)#match protocol ssh >> R2(config-cmap)#match protocol http >> >> R2(config)#policy-map OUTGOING >> R2(config-pmap)#class PRIORITY >> R2(config-pmap-c)#priority percent 25 >> >> WB Solutions >> >> R2(config)#class-map match-any PRIORITY >> R2(config-cmap)#match protocol ssh >> R2(config-cmap)#match protocol http >> >> R2(config)#policy-map OUTGOING >> R2(config-pmap)#class PRIORITY >> R2(config-pmap-c)#bandwidth percent 25 >> >> R2(config-pmap)#int s0/0/0 >> R2(config-if)#service-policy out OUTGOING >> >> can any one clarify on difference between bandwidth and priority? also >> like to know which solution is correct. >> >> Regards, >> Yusef >> >> > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > >
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