4A0-105 Nokia Virtual Private LAN Services Questions and Answers

Spanning tree will be disabled on the SAP that the PVST BPDU was received on.

The SAP that the PVST BPDU was received on will be disabled to prevent loops.

The spanning tree encapsulation will be dynamically changed to PVST on the SAP the PVST BPDU was received on.

The PVST BPDU will be ignored and 802.1D 2004 BPDUs will continue to be transmitted on the SAP.

MSTP

MCLAG

LACP

DHCP

A proprietary protocol

The PE devices participating in the VPLS mesh run a separate Spanning Tree instance in the Core. The Primary Bridge is the Root Bridge for the VPLS mesh.

The PE devices participating in the VPLS mesh determine which bridge is closest to Root Bridge. This bridge becomes the Primary Bridge.

The PE devices participating in the VPLS mesh determine which bridge has the lowest bridge-id. This bridge becomes the Primary Bridge.

The PE devices participating in the VPLS mesh determine which bridge is the Root Bridge. This becomes the Primary Bridge.

Bridge B

Bridge C

Bridge D

Bridge E

The service MTU must be equal to or smaller than 1514 bytes.

The service MTU must be 1514 bytes.

The service MTU must be equal to or greater than 1514 bytes.

The service MTU can be any value.

Spanning-tree BPDUs are returned to the sender.

The MEP sees its own CFM frames returned to itself.

This is not a function of IEEE 802.lag but of 802.1D

The record field of the CFM frame keeps track of chassis-mac addresses.

Configure the local age timer to be larger.

Configure the local age timer to be lower.

Configure the remote age timer to be larger.

Configure the remote age to be lower.

Ring topologies.

Metro-to-metro topologies

H-VPLS topologies.

Partial-mesh topologies.

TRUE

FALSE

RSVP-TE

SP-VLAN

QinQ

Dot1Q

Increased LSP count.

Number of TLDP sessions.

The amount of network touches.

FDB consumption.

Increased bandwidth and replication.

Mesh-sdp

Spoke-sdp

MPLS

GRE

9100 bytes

9104 bytes

9108 bytes

9118 bytes

The frame will be forwarded out the port associated with the DA.

The frame will be discarded.

The frame will be flooded to all ports.

The frame will be fragmented and forwarded out the port associated with the DA.

LDP must be enabled.

RSVP must be enabled.

An SDP must be configured on the far-end.

Service MTU must match.

SDP ID must match.

9100

9104

9108

9122

9126

The receiving PE checks the l-TAG in the l-SID to determine if there is a local l-VPLS on the node.

The receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the node.

The receiving PE checks the service label in the mpls header to determine if there is a local l-VPLS on the node.

The receiving PE checks the multicast B-DA to see if an l-SID has been mapped to the B-DA that matches a local l-VPLS on the node.

If the MAC address of this new client device does not reach the upper limit of the configured total number of MAC addresses allowed in the VPLS forwarding database, then the new MAC address will be stored.

The new source MAC addresses will not be entered in the VPLS service forwarding database.

New local source MAC addresses will not be entered in the VPLS service forwarding database, but new remote MAC addresses would continue to be entered.

New remote source MAC addresses will not be entered in the VPLS services forwarding database, but new local MAC addresses would continue to be entered.

There will be no impact on the path-mtu.

The path-mtu will decrease by4 bytes.

The path-mtu will increase by 4 bytes.

The path-mtu will decrease by 8 bytes.

The path-mtu will increase by 8 bytes.

Multicast frames only forward out ports that have a known receiver.

Unicast frames only forward out ports that have a known receiver.

If the FDB is empty, unicast and multicast frames are treated equally.

If the FDB has an entry for the unicast frame, both unicastand multicast are treated equally.