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What is the use of ERSPAN on N1kv?
A. Send monitored traffic to a VLAN
B. Send monitored traffic to a remote VEM over L2
C. Receive monitored traffic on a vEthernet interface
D. Send monitored traffic to an IP destination
Correct Answer: D
Explanation/Reference:
Explanation:
The destination probe is connected to Nexus 7000. We’d want monitored traffic originating from Nexus 1000v, to be forwarded to the probe.
The destination 10.2.0.1 specified by ERSPAN session (on N1kv) has an ARP entry in vlan 3000. There is also a corresponding static MAC address entry pointing to the port which the probe is connected. As a result, the ERSPAN traffic destined for 10.2.0.1 will be forwarded to the probe.
interface Vlan2000
…
ip address 10.1.0.2/24
hsrp 2000
ip 10.1.0.1
interface Vlan3001
…
ip address 10.2.0.1/24
ip arp 10.2.0.88 00AA.BBCC.DD66
interface Ethernet2/2
switchport
switchport access vlan 3000
no shutdown
mac address-table static 00AA.BBCC.DD66 vlan 3000 interface Ethernet2/2
Reference: http://www.seanxwang.com/2011/09/erspan-with-nexus-1000v-in-virtualized.html (Nexus 7000)
