[EMAIL PROTECTED] wrote: > Looking at the wiki on QoS is very helpful. > > But just wondered if there is anyone who > would want to comment on "ip rtp header-compression"? > > Is it a good thing, does it help on T1 or slower connections? > > Also why does Cisco often suggest the MultiLink thing?
Heres the RFC on rtp header-compression. it helps better with slower connections. http://www.faqs.org/rfcs/rfc2508.html Read the Assumptions and Tradeoffs. the Multilink "thing", commonly used on PPP links provide load balancing functionality over multiple WAN links, while providing multivendor interoperability, packet fragmentation and proper sequencing, and load calculation on both inbound and outbound traffic. It allows packets to be fragmented and the fragments to be sent at the same time over multiple point2point links to the same remote address. Heres an example. you have an isdn line with 2 64k B channels. You have your load threshold set for 50% meaning when you are using 50% of the bandwidth of the first channel the second channel connects. Now, you want to download a file. The first B channel connects, as the file downloads you reach that threshold and the second channel connects. Now you have 2 completly seperate channels connected, and in order for that same 1 file to now go across both links, the ISP router fragments the packets and sends them over both links. The fragments get to your isdn router and pieces it back together. There are many different types of QOS. And each one helps in the type of enviroment you are in. Class-based weighted fair queueing (CBWFQ) Priority queueing Weighted fair queueing (WFQ) Low latency queueing (LLQ) Link Fragmentation and Interleaving (LFI) Frame Relay Traffic Shaping (FRTS) for Voice ATM Traffic Shaping IP RTP Priority im sure theres more i just cant think of any off the top of my head.. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
