Re: pay attention to the real issue! in http://www.dslreports.com/forum/r10996215 en Sun, 29 Nov 2009 03:06:40 EDT Sun, 29 Nov 2009 03:06:40 EDT Re: UDP not TCP http://www.dslreports.com/forum/remark,11020023 tkdslr :
said by Andromeda451 See Profile:
Isn't VOIP based on RTP wrapped up in a UDP wrapper? So a TCP ping test may not reflect the situation accurately?


SIP uses both UDP and TCP.. ports 5060 & 5061
It can use either protocol. It will use TCP when UDP fails.
see »www.vonage.com/corporate/press_n···_04_17_0

In a route looping scenario, after UDP attempts will fail, and the TCP fall back will also fail (in an identifiable pattern).

"Ping", generally uses an (ICMP) packet, which uses the IP layer of the TCP&UDP/IP protocol. ]]> http://www.dslreports.com/forum/remark,11020023 Wed, 11 Aug 2004 04:06:37 EDT UDP not TCP http://www.dslreports.com/forum/remark,11015475 Andromeda451 : Isn't VOIP based on RTP wrapped up in a UDP wrapper? So a TCP ping test may not reflect the situation accurately?]]> http://www.dslreports.com/forum/remark,11015475 Tue, 10 Aug 2004 17:54:46 EDT Re: pay attention to the real issue! http://www.dslreports.com/forum/remark,10996215 tkdslr : "If these companies would simply spend as much time examining and improving their networks as they do blaming others for outages, the network would be flawless"

I agree.. A quick ping test of the GLBX/Vonage routers indicates a very familiar fault. Vonage/GBLX connections are suffering from Routing loops. :(

Routing loops, where a packet goes bouncing back and forth between two routers until the TTL expires. When it gets into a loop, that same packet grabs 100x the bandwidth until the TTL expires. After that everything is normal for some period of time (30secs to a minute) until the senders TCP protocol times out and issues a retry.

If the routing loops get bad enough, then route flapping will also occur. ]]> http://www.dslreports.com/forum/remark,10996215 Sun, 08 Aug 2004 16:43:50 EDT pay attention to the real issue! http://www.dslreports.com/forum/remark,10995395 chrisbmoore : If these companies would simply spend as much time examining and improving their networks as they do blaming others for outages, the network would be flawless!!]]> http://www.dslreports.com/forum/remark,10995395 Sun, 08 Aug 2004 14:40:27 EDT