Category: 350-027

350-027 CCIE Written: Metro Ethernet

When executing the following show mpls l2transport vc detail command

When executing the following show mpls l2transport vc detail command, you notice the link does not come up. Choose the most likely cause.

PE#sho mpls l2transport vc detail
Local interface: Et0/0 up, line protocol up, Ethernet up
Destination address: 172.168.1.102, VC ID: 100, VC status: down Preferred path: not configured
Default path: active
Tunnel label: 16, next hop point2point
Output interface: Se5/0, imposed label stack {16 16}
Create time: 00:18:10, last status
change time: 00:03:51
Signaling protocol: LDP, peer 172.168.1.102:0 up
MPLS VC labels: local 16, remote 16
Group ID: local 0, remote 0
MTU: local 1500, remote unknown
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, send 78

what path EoMPLS will take before exiting a router:

Observing the output below from the PE router, select what path EoMPLS will take before exiting a router:

PE#show mpls l2transport vc 100 detail
Local interface: Fa0/0.1 up, line protocol up, Eth VLAN 100 up Destination address: 172.0.0.3, VC ID: 100, VC status: up
Preferred path: Tunnel1, active
Default path: disabled
Tunnel label: 3, next hop point2point
Output interface: Tu1, imposed label stack {27 20}
Create time: 00:07:11, last status
change time: 00:07:11
Signaling protocol: LDP, peer 172.0.0.3:0 up
MPLS VC labels: local 16, remote 20
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled

When executing the following show mpls l2transport vc detail command, you notice the link does not come up

When executing the following show mpls l2transport vc detail command, you notice the link does not come up. Choose the most likely cause.

PE#sho mpls l2transport vc detail
Local interface: Et0/0 up, line protocol up, Ethernet up
Destination address: 172.168.1.102, VC ID: 100, VC status: down Preferred path: not configured
Default path: active
Tunnel label: 16, next hop point2point
Output interface: Se5/0, imposed label stack {16 16}
Create time: 00:18:10, last status change time: 00:03:51
Signaling protocol: LDP, peer 172.168.1.102:0 up
MPLS VC labels: local 16, remote 16
Group ID: local 0, remote 0
MTU: local 1500, remote unknown
Remote interface description:

Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, send 78

What is the maximum number of LDP sessions created for pseudowire signaling throughout

A service provider offers Virtual Private LAN Service over its MPLS-enabled network. Currently 6 provider edge switches total are in service. There are 5 customers who subscribed for the service, and every customer has 2 sites attached to every provider edge switch. What is the maximum number of LDP sessions created for pseudowire signaling throughout the service provider network to have full Layer-2 connectivity among all sites of each customer?

From the MPLS-TE configuration above, one can conclude that:

– interface tunnel 1 tunnel destination 10.10.10.10 ip unnumbered loopback0 tunnel mode mpls traffic-eng tunnel mpls traffic-eng affinity 0x0 mask 0x1 tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng bandwidth 155000 <sub-pool 40000> tunnel mpls traffic-eng fast-reroute tunnel mpls traffic-eng path-option 5 dynamic tunnel mpls traffic-eng path-option 6 explicit name path-list1 tunnel mpls traffic-eng priority 7 7 tunnel mpls traffic-eng record-route From the MPLS-TE configuration above, one can conclude that:

Observing the output below from the PE router, select what path EoMPLS will take before exiting a route

Observing the output below from the PE router, select what path EoMPLS will take before exiting a router: PE#show mpls l2transport vc 100 detail Local interface: Fa0/0.1 up, line protocol up, Eth VLAN 100 up Destination address: 172.0.0.3, VC ID: 100, VC status: up Preferred path:
Tunnel1, active Default path: disabled Tunnel label: 3, next hop point2point Output interface: Tu1, imposed label stack {27 20} Create time: 00:07:11, last status change time: 00:07:11 Signaling protocol:
LDP, peer 172.0.0.3:0 up MPLS VC labels: local 16, remote 20 Group ID: local 0, remote 0 MTU: local 1500, remote 1500 Remote interface description: Sequencing: receive disabled, send disabled


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