Exam 350-401 topic 1 question 190 discussion

Shouldn't this be C? SW2 is using PAgP

For me the answer is C, this is a cisco exam, however at least one of those switches should be cisco, and according with the picture, both outcomes are the same, so both are cisco.

We are not told that both switches are CISCO switches so changing both to LACP guarantees the formation of an etherchannel. C assumes they're both CISCO switches

Answer is C , the I - Stand-ALone means that SW2 is the only one using PagP and SW3 it's not. Stand-ALone means that switch 2 is the only one standing in PagP mode .

The command show ethercahnnel summary isn't used only by cisco ?? Mostly...

D is correct the exhibit is not complete, here is the complete one. Switch2 #show etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+---------------------------------------------- 1 Po1(SD) PAgP Gi0/0(I) Gi0/1(I) Switch3 #show etherchannel summary Flags: D - down P - in port-channel I - stand-alone s - suspended Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+---------------------------------------------- 1 Po1(SD) LACP Gi0/0(I) Gi0/1(I)

It's running PAgP.

The provided answer should be correct l, when you change the mode to on both interfaces then you will have LACP instead of PAGP.

The simple fact that the etherchannel bundle is showing PagP and the interfaces are showing standalone, even when connect suggest that the SW might be a different protocol. You are better off changing the channel protocol to active. I support D as the final answer.

A problem with this question is that it does not specify what switch the proposed configuration should be on for answers C and D. Also answers C and D says both INTERFACES, not both switches. C would be correct if we're changing both interfaces on SW3 so that we match PagP on SW2. But answer D could be correct if we change both interfaces on SW2, since with the complete configuration shown for SW3 on other sites for this question, it is configured for LACP.

I can't see the entire output, so I don't know the deal with SW3. But if we have PAgP configured on the SW2, then on the SW3, we must configure auto or desirable to bring etherchannel up.

SW2 It's already configured with Port Aggregation Protocol as shown on the output of Show Etherchannel Summary. The question also does not specify which switch to make the configuration we are to assume it's on SW3, if we configure Active on both interfaces the Etherchannel will not bundle due to incompatible protocols Active/Passive are both configuration for LACP. Active/Passive = Bundle Active/Active = Bundle Passive/Passive = No bundle Auto/Desirable are both configurations for PAGP Auto/Desirable = Bundle Desirable/Desirable = Bundle Auto/Auto = No bundle Hope this helps.

C is correct one side (sw2) shows PAgP, so for the etherchannel works properly both sw must run the same protocol, so teh option is "desirable" Regards!

mode desirable for PaGp, mode active for LACP

This question is ridiculous. Both solutions can work, it depends if I have multivendor on my enviroment or not. Of course as the other says because both are Cisco switches Cisco prefer to use their own protocols....

It's a cisco exam.... the question doesn't say anything about non Cisco-Switches it's C

for me is 100% C because from the picture the switches are cisco platform