Configuration Example, IP Telephony

Strange VPDN-GROUP behavior

René Jorissen on April 1, 2009 1 Comment • Tags: #group #l2tp #receive #receivewindow #tunnel #vpdn #vpdngroup

I noticed some strange behavior in a vpdn-group configuration on a Cisco 876 router. I have a router with the following vpdn-group configuration: vpdn-group pptp-group ! Default PPTP VPDN group description pptp vpn users accept-dialin protocol pptp virtual-template 10 The configuration is working perfectly and users can dialin using a PPTP connection. Backups of the … Read More

Configuration Example, IP Telephony

QoS matching for VoIP

René Jorissen on April 18, 2008 0 Comments • Tags: #1720 #2427 #2428 #h225 #h245 #h323 #mgcp #payload #rtcp #rtp #sccp #sgcp #signaling #tcp #udp #voip

Voice over IP is, as you know for sure, very time-sensitive traffic. That is why VoIP signaling and payload traffic should receive enough bandwidth and as less jitter and delay as possible. QoS is an important tool to assign VoIP traffic more preference over “normal” traffic. Important for QoS tools to function correctly is placing … Read More