Would you post the questions you remember please? Thanks

Maybe I’m missing something here, please enlighten me.

My advice to pass the exams is to answer the question fast, but make sure you choose the right answer before you move to the next one; also, the important thing to pass the exam is don’t be nervous relax my friend, and think about the succeeding only and you are good to go.

peace ^_^

-to select a root port we need to choose the lowest cost to root bridge, but if it’s the same, we check the bridge ID (that’s why it saids the links are operating at the same bandwidth).

the correct sequence is :

1- Cost to root bridge.

2- Lost Bridge ID ( Bridge priority + MAC address)

3- Lowest Interface number.

is this sequence is correct???

When the link fails, STP will be recalculated in order to find alternate and loopfree path. This time is usually les than 1 min. With rapid STP the time is even lower.

0 + 1 (vlan 1 by default) = priority of 1

Note priority is already “set” in CLI and accepted as such…….

AHCORESW(config)#spanning-tree vlan 10 pri
AHCORESW(config)#spanning-tree vlan 10 priority 1
% Bridge Priority must be in increments of 4096.
% Allowed values are:
0 4096 8192 12288 16384 20480 24576 28672
32768 36864 40960 45056 49152 53248 57344 61440
AHCORESW(config)#

The exam was 51 questions, only one drag and drop about cable types, all questions are very easy just similar to 9tut.

The lab simulations were Eigrp , ACL1 (similar to 9tut exactly) and ACL2 (modification 3 but with host B to access the finance server)

Good luck for everyone, just be relaxed its very very easy :)

question 8 was in it

For Q6 answer: we need to assume that the root port for vlan 3 in sw1 is f0/9. If it gets disconnected, STP will need less than 1 minute to reconverge the network and assign fa 0/7 as root port for vlan 3. Once it’s done, the traffic from host B to the server will be forwarded through the network.

The port for this VLAN is in blocking state – it wouldn’t be that way if there would be only one interface connected to that VLAN, right? And it’s not root because the other one has lower interface number.

Per-VLAN Spanning Tree Plus (PVST+, or sometimes PVSTP), is a Cisco-proprietary improvement of 802.1D STP. Rapid Spanning Tree Protocol (RSTP).
Over time, the IEEE improved STP beyond the 802.1D standard with the Rapid STP (802.1W) protocol. Then Cisco took that standard and made another proprietary improvement, creating another mode in Cisco switches: Rapid PVST+, or simply RPVST+.

Explanation must be: “Rapid PVST+ is based on IEEE802.1D (specification as IEEE802.1D-2004) Spanning Tree Protocol (STP). But Rapid PVST+ has only 3 port states..”

The answer will not change, but maybe there is some misunderstanding.

A. This switch has more than one interface connected to the root network segment in VLAN 2.>>Not correct because from the given exhibit Vlan 2 has one connected interface
B. This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree. >> Not correct because no where on the given exhibit we can tell if it is RSTP or not.
D. This switch has a lower bridge ID for VLAN 2 than the elected designated switch. >> Not correct because no where in the given exhibit we have any info about VLAN 2 bridge ID
The only one ans left is C and that the correct ans.

802.1q: trunking protocol able to carry multiple vlan between Switches (help to carry untagged frame, frame which belong to default vlan), is a open standard and for is ISL (InterSwitch Link) use between Cisco devices. but the use is 802.1q.

Thanks,

Thanks a lot 9tut. Almost all questions were from here except for two.
Had the EIGRP and ACL 1 sims.

Yes you are right, you cant configure 1.

but if you configure a multiples of 4096 the IOS add a value called system-id extension which is

a number chosen according to the vlan number(this a pvst feature)

ex: if configure “spanning-tree vlan 10 priority 4096″ for vlan 10, the priority for the this switch’s vlan 10 will be show up in the output of the show spanning-tree vlan 10 command as 4106.

based on this if you configure spanning-tree vlan 1 priority 0 command for vlan 1, the priority for the vlan 1 will be 1. I repeat this is a pvst concept so you better find out the different format between the bridge-ids of STP and PVSTP which will answer the question of why the IOS only allow multiples of 4096.

This has been answered by Jason on page 1. Setting the priority for a switch in vlan 1 to 0 effectively gives a switch a priority of 1.

This can be verified:

Switch#sho spanning-tree vlan 1
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 1
Address 0001.C9EB.C004
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 se

0 4096 8192 …. and on!

in theory, the priorities has to be by multiples of 4096!!!!!

Q2, Q4, Q8 in exam today