We have a requirement for tracking flows within our network and external traffic. We can get, say, utilization on a port by using MRTG. What we would realy like is layer 3/4 stuff (ip addresses and tcp/udp) ports. ONe thing that has caught my eye is netflow. MY understanding is that if I enable netflow and then export this to a collecter it will present me with what I need.
Will enabling netflow impact on switch router performance (we have 2 6500s with sup1as and msfc 1)?
What Would be a good collector? Ive looked at NTop which seems ok. Can ngenius do the same?
Are the Network Analysis MOdules a better bet. (pricey probably!)
[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...