SVI EoMPLS

[Sherif Atef Ahmed Ismail]

Dears

Would like your assistance please regarding SVI-based EoMPLS

Below is a scenario where I saw SVI-based EoMPLS.

[server] <---trunk--> SW-A <------ IP/MPLS -------> SW-B / SW-C

SW-A

interface vlan 5

xconnect  --->> SW-B

interface vlan 6

xconnect --->> SW-C

My question now why will traffic goes to SVI from the beginning since it has no IP address

Usullay in case of a L3 switch, server is configured with SVI IP address as its gateway .. thus traffic reaches SVI

But in this case, SVI has no IP address, so wonder why traffic will go to SVI

Many Thanks

Sherif Ismail

[Sherif Atef Ahmed Ismail]

I believe switch considers SVI interface as a normal interface so when SW receives a unicast packet with an unknown destination mac address, SW forward it through all interfaces including SVI interface

Correct ?

|||||||

I believe this can also be applied in case of VPLS

When traffic reaches interfaces fa4/2 it is forwarded through all interfaces member in its VLANs

Correct ?

interface FastEthernet4/2

no ip address

description ---->> facing CE

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 111,222

switchport mode trunk

!

l2 vfi cust-one-111 manual

vpn id 1

neighbor 10.100.100.1 encapsulation mpls

neighbor 10.100.100.3 encapsulation mpls

!

l2 vfi cust-one-222 manual

vpn id 2

neighbor 10.100.100.1 encapsulation mpls

neighbor 10.100.100.3 encapsulation mpls

!

interface Vlan111

no ip address

xconnect vfi cust-one-111

!

interface Vlan222

no ip address

xconnect vfi cust-one-222