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You want Site 1 to access three VLANs that are located in Site 2 and Site 3. The customer-facing interface on the PE-1 router is configured for Ethernet-VLAN encapsulation.
What is the minimum number of L2VPN routing instances to be configured to accomplish this task?
The minimum number of L2VPN routing instances required to accomplish this task is three, one for each VLAN: VLAN 200, VLAN 300, and VLAN 301. This is because each VLAN needs its own routing instance to handle the distinct traffic and encapsulation requirements. Therefore, configuring three separate L2VPN routing instances ensures that traffic from each VLAN is properly routed and managed.
I would have thought one, with different site id's ?
Guys you only need one routing instance. Go and study site IDs and attachment circuits.
Correct answer is 3
It is a VLAN-CC encapsulation, and it requires 3 L2VPN instances for each VLAN 200, 300 and 301
Shouldn't be 2? 1 for site2 and 1 for site3? this is not clear for me.
I'd says two. One routing-instance for vlan 200 and one routing-instance for VLAN 300 & 301.
answer c
Physical interface encapsulation ethernet-vlan? Or l2vpn encapsulation ethernet-vlan? If l2vpn encapsulation ethernet-vlan then answer A- One
B B. 2 Explanation: You need one L2VPN routing instance for each site that Site 1 needs to connect to. Since Site 1 needs to access VLANs in both Site 2 and Site 3, you will need two L2VPN routing instances Answer A states that only 1 L2VPN routing instance is required. However, this is not sufficient for the following reasons: Multiple Sites: Site 1 needs to access VLANs located in both Site 2 and Site 3. Each site requires a separate L2VPN routing instance to establish the necessary connections. VLAN Encapsulation: The customer-facing interface on the PE1 router is configured for Ethernet VLAN encapsulation, which means each VLAN needs to be mapped to a specific L2VPN instance. Therefore, to ensure that Site 1 can access VLANs in both Site 2 and Site 3, you need at least 2 L2VPN routing instances, one for each site. Answer C states that 3 L2VPN routing instances are required. Since Site 1 only needs to connect to two sites (Site 2 and Site 3), only 2 L2VPN routing instances are required. Therefore, Answer C is not correct because it suggests more instances than needed.
I believe the answer would have to be three in order to able to seperate all three vlans and send 2 to one site, 1 to another... you couldn't have one RI spending to two vlans to one site and one RI spending one vlan to another site unless they were seperate interfaces.
Just one L2vpn instance with multiple sites.
Just one. Just think how layer 2 works. If I send a packet with VLAN 300 to site 2, it will just drop the packet. It isn't asking how to avoid sending packets to sites without the VLAN configured; it just wants to know the MINIMUM number of VPNs.
If it were port-based (raw Ethernet encapsulation), 1 L2VPN might work. But with Ethernet-VLAN encapsulation, you must configure one L2VPN per VLAN.
Actually should be 1 as eth encap is only on PE1 which carries 1 vlan. Final answer A.