I configured an erspan session running on a Nexus 3k with 2 sources:
1st source is an interface on the same switch
2nd source is a set of vlans which go through a trunk port which already has a span session running
Config is as below:
monitor session 10 type erspan-source erspan-id 10 vrf default destination ip 10.1.1.1 source interface Ethernet1/18 both source vlan 3-5,10 no shut
monitor erspan origin ip-address 10.1.1.100 global
In the config above, 10.1.1.1 is the station running tcpdump
10.1.1.100 is the IP of the switch itself
To add some complexity to the set up: The 1st source is a switchport that has been sub-divided into 2 sub-interfaces i.e. eth1/1.1 and eth1/1.2 and the capture station's interface is also subdivided into several VLANs
The capture has ran for a few days and I am not capturing what I am intending to capture. I am seeing traffic that isn't meant to traverse those 2 sources.
Is it due to the fact that the capture is going to a sub-int or because i am using vrf default or a combination? :)
Would appreciate it if someone could send some pointers my way.
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i have one switch and two ports for two dirrent network they is ring both port in same vlan configuration, i want solution if one port down then autometic traafic gone from 2nd port it is possible? Note: switch1 in 2 ethernet port avaibal...