Hi all,I have a vey simple VoIP network to implement: three sites connected by a Frame-Relay cloud with a VoIP VLAN in each site. I have to connect two IP Phones (7960) for each site and they must communicate among them, while there is no need to int...

I have a router R with interface FastEthernet 0/0 connected to a switch SW. R is running PIM in dense mode on all interfaces and from inerface Fa0/0 igmp queries are sent. When I turn on a host which injects a high level of broadcast traffic into SW,...

Hi all,I think I can understand IGMP snooping when there is a router on the LAN. But what about a group of hosts simply connected to a layer-2 switch (capable of doing IGMP snooping)? If there is no router connected, are IGMP messages sent? To who? I...

Hello,I'm checking port stats on a switch. On several ports, I see some CRC and other errors. The error percentage is usually something like one error out of one thousand packets.    Can this be considered normal? Should I worry about this?Thanks!

Hi all,I have configurd a 3G WWAN HWIC (in a 2800 router) as it's reported below. Then I have left the router on for some weeks, but without any traffic in the internal LAN. Now my company have received a huge bill (several thousands of euros) for th...