l2vpn p2p E-line | E-access

Question 1

Difference between E-Line and E-access

Answer 1

E-line is between two customers in the same SP
E-Access spans multiple SP and Q-in-Q is used

Question 1

vlan tag flow

Answer 1

SP1 and SP2 must agree on which vlan to use

CE1 originates a frame with an 802.1Q tag of 100

SP1_PE3 pushes the S-tag 1234 ontop of the existing customer tag (C-tag of 100)

SP2_PE1 removes the top-most tag of 1234

CE2 will receive the original frame with only a tag of 100