We want to firewall load balancing.Firewall LB can be possible, without placing the layer4 switch the front of and the back of firewall?If so, how can it be possible?Probably, is that why two firewalls exchange nat table information (packet session i...

We have two servers in the different networks, not using DNS service. And we want to use one server by backup.Then, using L4 switch, is it possible?What configuration and protocol will be necessary for L4 configuration?

We have two VoIP Softswitch systems at the different network for disaster recovery. I want to use these VoIP SSW for backup.If these two systems are in the geographically different locations and networks, what solution and protocol and devices will b...

Deal allWhat is the main difference between VoIP & IPT solutions?What is the strong points of IPT?

We have mis-confiugred etherchannel at the 6509 switch. One side is 6509, the other sides are PC hosts.We configured etherchannel at the 6509 switch, but would not configure at host side.In that case, we found the other host mac address connected to ...