How can you configure SPAN source for a specific VLAN of a trunk port?.
You must specify how the ingress traffic should be handled.
(global)# monitor session SESSION-NUMBER source.
How will STP act on a SPAN destination port?.
One-way traffic is sufficient for network analysis.
What happens with the traffic that is sent to the SPAN destination interface?.
Normally all kind except L2 protocol data like STP, CDP, PAgP etc.
What kind of traffic is copied from source interface to destination?.
If congestion happens and the queue is full, then packets are going to be dropped.
The copied traffic is going through the destination port’s egress queue.
What happens when the source and destination port has different speeds?.
If you specify a VLAN as SPAN source, then all the traffic passing through the ports that are member of the VLAN is going to be copied to the destination port.
If you specify a physical interface (member of the EtherChannel), then only the traffic of that interface will be copied to the destination port.
If you use the PortChannel interface as source, then all the traffic passing through the EtherChannel will be copied.
How does SPAN handles EtherChannels as source?.
you can configure a VLAN filter to the SPAN source, this way limiting the VLANs that will be monitored.
It can copy all traffic from all VLANs to the destination port or.
How does SPAN handles trunk interfaces as source?.
The mirrored traffic is copied over a special-purpose VLAN across trunks between switches from the source to the destination.
Remote SPAN (RSPAN): The source and destination ports are located on different switches.
Local SPAN: Both the source and destination ports are located on the same switch.
When packets arrive on the source port, they are specially marked so they can be copied to the SPAN destination port.
Switched Port Analyzer mirrors traffic from one source port or VLAN to a destination port.
I know it's a complicated question (I think near to a CCNP or CCIE level) and I realy appreciate your help. if the response is yes I could also say that my response is no.Įven I had the responses from theses two questions I don't realy sure it will realy work. I don't know If the "deja-vue" filtering for avoiding loop also apply on outgoing trafic or just on incomming one. In the second case my response will be no due to the two different path that use the same mac address and result on issues on mac table. I don't know if frame forwoard also look for vlan tag on the mac table or first look on the mac table and look if the vlan is authorized. Nether theses information, I can clearly say if yes or no I can forwoard the flow because : Your destination is not contained on the mac table and so the frame is forwoarded on to the pinned uplink for this vif path (if no pinning policy is defined for the vnic, ucsm choose himsef one correct uplink for the vnic) Your destination is contained inside the mac table (that you can see with show table) and your frame is forwoarded to the corresponding host (using another pseudowire vif path) When you frame is on the fi, according to the cisco documentation, we can considere two cases : When you connect to the nxos you can see virtual interface vether with the corresponding vif number. When the frame is forwarded, a specific label is appended with the vif number that used to route the packed on the pseudowire. On the FI, the virtual nic is showed as circuit. IOM Do the same job as vic card and forwoard the frame on the specific link for this vif path. Morother each vif is configured to use one specific backplane link to join the IOM. the trafic is forwarded to the corresponding IO modules according to the path specified for this vnic (static or using hardware assisted failover). What I know on the inner packet processing : Blade contain vic card that provides virtual interface to the ESXi side. I can't do ERSPAN because the destination is not able to decapsulate the GRE on destination. More explanation below : I have some ESXi host where I need to collect inter-vm mirrored trafic. Hello, I will resume my issue on a simple question, but it's a inner realy complicated problem.Ĭan I forwoard RSPAN flow from a blade to the outside ?