We are using an applications that relies on Checkpoint tunnel for connection. It starts out by sending 2 identical syn packets out to the server. On monitoring we found that one of the syn packets is being dropped. The packets are not attepting to cross a router. All traffic is in the same network. Our network is based on Catalyst 5000 switches. Two switches are connected by ISL trunk. Can anyone tell me why the second packet is being droped, and how it might be fixed.
Apparently this is a security feature. If the first packet gets spoofed, when the second one shows up the system will catch it. This is actually happening with a system we are trying to get running. It has worked when we get the switches out of the picture.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...