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
