briansmith41 Posted June 20, 2022 Share Posted June 20, 2022 This question asks for etherchannels to use the "shortest link bundling time possible". I realized that seems to simply mean that any LACP enabled ports should be using "mode active". Make sense to anyone else? I believe I got this wrong on the last attempt by not using "mode active" 2 Link to comment Share on other sites More sharing options...
MrPlinkett Posted June 21, 2022 Share Posted June 21, 2022 This question is really bugging me. There's nothing you gain from making both sides active/active. LACP Rate fast is not available in the exam, I have tried it. The only thing I am starting to wonder is the Max-Bundle/Fast switchover combination. This makes the link bundle time extremely short if there's a failure on one of the links. I suspect that might be where the correct answer lies. 2 1 Link to comment Share on other sites More sharing options...
nebula Posted June 22, 2022 Share Posted June 22, 2022 23 hours ago, MrPlinkett said: This question is really bugging me. There's nothing you gain from making both sides active/active. LACP Rate fast is not available in the exam, I have tried it. The only thing I am starting to wonder is the Max-Bundle/Fast switchover combination. This makes the link bundle time extremely short if there's a failure on one of the links. I suspect that might be where the correct answer lies. Are you have taking exam? 1 Link to comment Share on other sites More sharing options...
MrPlinkett Posted June 22, 2022 Share Posted June 22, 2022 I have taken the exam, yes 1 Link to comment Share on other sites More sharing options...
Dunkle Posted June 23, 2022 Share Posted June 23, 2022 On 6/21/2022 at 2:33 AM, MrPlinkett said: This question is really bugging me. There's nothing you gain from making both sides active/active. LACP Rate fast is not available in the exam, I have tried it. The only thing I am starting to wonder is the Max-Bundle/Fast switchover combination. This makes the link bundle time extremely short if there's a failure on one of the links. I suspect that might be where the correct answer lies. Good point. Also i would point out that the task also mentions that you should not change the existing etherchannel configuration if any. So making both sides active would be going against that statement as I believe at least one switch has channel-group configured on all ports. 1 Link to comment Share on other sites More sharing options...
MrPlinkett Posted June 23, 2022 Share Posted June 23, 2022 Can't say whether it's the right answer or not, but I don't see what other options are available. However, the question does state that all interfaces must be up and active, so if you place max-bundle 1 and LACP-Fast switchover, I am not sure that's going to be correct. It's a tough question that I can't find any other examples of online. 1 Link to comment Share on other sites More sharing options...
Dunkle Posted June 25, 2022 Share Posted June 25, 2022 Is LACP Fast switchover even an available command on the IOSvL2 image? I don't believe it is. Also noticed that IOSvL2 image is a little buggy with Port Channels not using LACP as well. You need to shut the port channels down and configure the interfaces and then no shut the port channels on both sides to get them to come up. 2 Link to comment Share on other sites More sharing options...
briansmith41 Posted June 25, 2022 Author Share Posted June 25, 2022 LACP fast switchover IS available on that image Dunkle. But that command only applies when max-bundling is used with it....so I really don't think the solution is valid. It has to be "mode active" despite it not making tons of sense. 1 Link to comment Share on other sites More sharing options...
MrPlinkett Posted June 26, 2022 Share Posted June 26, 2022 I have discovered that there's a delay of 2 seconds for the passive side if you're active/passive, so making both sides active is potentially making it shorter. However, it's not really "tuning" anything. 2 1 Link to comment Share on other sites More sharing options...
briansmith41 Posted June 26, 2022 Author Share Posted June 26, 2022 Awesome, that at least leads me to believe my method is correct...ish 1 Link to comment Share on other sites More sharing options...
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