What show command can see vpn tunnel establish with traffic passing through.

What show command can see vpn tunnel establish with traffic passing through.
A . show crypto ipsec sa
B . show crypto session
C . show crypto isakmp sa
D . show crypto ipsec transform-set

View Answer

Answer: A

Explanation:

#show crypto ipsec sa – This command shows IPsec SAs built between peers In the output you see

#pkts encaps: 345, #pkts encrypt: 345, #pkts digest 0

#pkts decaps: 366, #pkts decrypt: 366, #pkts verify 0

which means packets are encrypted and decrypted by the IPsec peer.

Source: http://www.cisco.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike­protocols/5409-ipsec- debug-00.html#ipsec_sa