No problem man, glad to help! happy studying
//r.a. On Fri, Dec 17, 2010 at 8:35 AM, Nicolas MICHEL <[email protected]>wrote: > WoW thanks for this man !!! > > Much appreciated ;) > > > > > > > 2010/12/17 Ricardo <[email protected]> > >> Thats right, and to be more precise, it matches every RTP+UDP packet in >> that range, by default Cisco and almost all vendors use RTP even ports (and >> RTCP odd ports) >> >> What I mean is that "match ip rtp 16384 16383" does not match every UDP >> even port, but every RTP+UDP port. >> >> //r.a. >> >> On Fri, Dec 17, 2010 at 8:24 AM, Nicolas MICHEL >> <[email protected]>wrote: >> >>> Thanks Ricardo for the explanation it makes sense now. >>> >>> >>> however, I agree for the ACL range but what about the command >>> >>> >>> match ip rtp 16384 16383 . it matches every even number in the RTP UDP >>> range 16384 32767 right ? >>> >>> >>> Thanks >>> >>> >>> >>> >>> But the example are match ip >>> >>> 2010/12/17 Ricardo <[email protected]> >>> >>> Nicolas, >>>> >>>> When working with ranges in a class map definition we define the >>>> starting port number and the range of ports, ie 16384 as staring port and >>>> 16383 more ports, that is up to port 32767. >>>> >>>> When using ACL we define a range: ie starting and ending port. >>>> >>>> Moreover when we work with ACL we define ANY traffic using UDP and with >>>> class-maps only the RTP using UDP ports. >>>> >>>> To talk about something deeper however is that a good thing of ACL >>>> though is that we have included RTCP (odd even port numbers) as well, not >>>> in >>>> the class map matching RTP Only. >>>> >>>> //r.a. >>>> >>>> On Fri, Dec 17, 2010 at 6:25 AM, Nicolas MICHEL < >>>> [email protected]> wrote: >>>> >>>>> Hey there guys! >>>>> >>>>> I'm actually reading Cisco QoS Book from Wendell Odom and something is >>>>> interesting here. >>>>> >>>>> They are using class-map like this to match ALL RTP traffic >>>>> >>>>> class-map RTP >>>>> match ip rtp 16384 16383 >>>>> >>>>> >>>>> Isn't that weird ? In most document I see that they use an ACL that >>>>> match >>>>> UDP 16384 to 32767 . >>>>> >>>>> >>>>> Can someone have some hints about this ? >>>>> >>>>> >>>>> many thanks for the help provided. >>>>> >>>>> >>>>> >>>>> Nicolas >>>>> _______________________________________________ >>>>> For more information regarding industry leading CCIE Lab training, >>>>> please visit www.ipexpert.com >>>>> >>>> >>>> >>> >>> >>> -- >>> Nicolas MICHEL >>> Ingenieur Réseaux et Securité (CCNA/CCNP) >>> >>> >>> >>> >>> >> > > > -- > Nicolas MICHEL > Ingenieur Réseaux et Securité (CCNA/CCNP) > > > > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
