Shouldn't it 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.

The answer is C because SW2 is running PAgP (Cisco Proprietary). "channel-group 1 mode desirable" enables PAgP. "channel-group 1 mode active on" enables LACP. This also shows that both switches are Cisco switches.

Maybe SW3 is not a Cisco Switch? LACP Works on both CISCO and Non CISCO

Selected Answer: D 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)

Selected Answer: D 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.

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....

as you can see, there´s a protocol mismatch on both sides. PAgP is a Cisco proprietary protocol, whereas LACP is an open standard, making LACP the better choice (we don´t know if SW3 is a cisco swich or not). since SW3 is set for LACP, configuring LACP is the best way to fix this issue.

Thanks for posting the full exhibit, if thats the case I'd go with D as LACP will work on both the switches.

exactly

Both r cisco sw pls check sw symbol.

Selected Answer: C mode desirable for PaGp, mode active for LACP

I can't see the whole output, so I don't know what's going on with SW3. But if PAgP is configured on SW2, then on SW3, we have to configure auto or desirable to bring etherchannel up.

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

Selected Answer: C for those who chose D, the exhibit shows were using pagp. At first i was sitting here wishing this question would let us know if its cisco prop or multi vendor but i noticed Pagp on SW 2 summary. Answer is C

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

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

Selected Answer: C 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.

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.

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

Active mode

Selected Answer: C It's running PAgP.

Selected Answer: C 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 .

Selected Answer: D 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