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Exam 150-820: Brocade Certified Ethernet Fabric Professional 2015

what is happening?

You connected interface 2 on a Brocade VDX 6740 to your LAN, but no traffic is traversing
the link. SW1# show interface tengigabitethernet 1/0/2 TenGigabitEthernet 1/0/2 is up, line
protocol is down (link protocol down)
Hardware is Ethernet, address is 0027.f8b2.d728

Current address is 0027.f8b2.d728
Pluggable media present
<truncated output>
Receive Statistics:
0 packets, 0 bytes
Unicasts: 0, Multicasts: 0, Broadcasts: 0
64-byte pkts: 0, Over 64-byte pkts: 0, Over 127-byte pkts: 0
Over 255-byte pkts: 0, Over 511 -byte pkts: 0, Over 1023-byte pkts: 0
Over 1518-byte pkts(Jumbo): 0
Runts: 0, Jabbers: 0, CRC: 0, Overruns: 0
Errors: 0, Discards: 0
Transmit Statistics:
0 packets, 0 bytes
Unicasts: 0, Multicasts: 0, Broadcasts: 0
Underruns: 0
Errors: 0, Discards: 0
<truncated output>
Referring to the exhibit, what is happening?

What is the problem?

Referring to the exhibit, you connected your Brocade VDX device to an Ethernet switch
running PVST+. The interfaces are up but spanning tree is not functioning for VLAN 10.
VDX8770_3-131#sh run prot
protocol spanning-tree rpvst
!
VDX8770_3-131# sh run int vlan 10
interface Vlan 10
!
VDX8770_3-131#sh run int te 131/2/16
interface TenGigabitEthernet 131/2/16
fabric isl enable
fabric trunk enable
switchport
switchport mode trunk
switchport trunk allowed vlan add 10
switchport trunk tag native-vlan
no spanning-tree shutdown
no shutdown
What is the problem?

Which two parameters should be configured to accomplish this task?

Your customer has just implemented a Brocade VCS Fabric at the aggregation layer that
interfaces with core and edge switches running RSTP. The Linux servers are detecting
BPDUs at their interfaces confirmed by using the tcpdump command from a server. You
want to prevent this traffic. Which two parameters should be configured to accomplish this
task? (Choose two.)

what would be the cause of the discards?

As a network administrator, you see a very high number of receive discards in the interface
statistics of an ISL within your VCS fabric. After further investigation, the discards are found
to be incrementing due to tail drops. (Truncated example of the interface stats)
Receive Statistics:
1632132 packets, 220809631 bytes
Unicasts: 1632131, Multicasts: 0, Broadcasts: 1
64-byte pkts: 985885, Over 64-byte pkts: 415575, Over 127-byte pkts: 88870
Over 255-byte pkts: 86119, Over 511 -byte pkts: 17667, Over 1023-byte pkts: 38016
Over 1518-byte pkts(Jumbo): 0
Runts: 0, Jabbers: 0, CRC: 0, Overruns: 0
Errors: 0, Discards: 912313
Referring to the exhibit, what would be the cause of the discards?


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