I have 3 Switch 12 ports, connected each other in looping and i want to add another loop so that in case the cable is dead i have another backup, what is the command or settings to make the state of some ports are always forward, i need someone kind here to support me plss!
I hope that I am correcct in your present setup.In your design, Switch 1 is connected to switch 2, then switch2 is connected to switch 3 and switch3 is connected bacl to switch1 to form a loop.
Where do you want to connect another cable? If you want to create another cable between switch 3 and switch1, i would suggest to create an ether-channel of the two ports. This will give you redundancy, load-sharing and an alternate oath in case one of the link goes down.According to the STP it will be a single logical link and both of the ports will be forwarding incase if its not already blocked. If its in block state then we can use " spanning-tree port priority " or "spanning-tree vlancost" command to make this a forwrading link.
i tried to do that in ether channel on group 1 mode on, but the switch 3 it goes shutting down on all ports, anyway that exacly the scenario i have now here! and im realy, realy glad your support plss, i need another help in this case
You have to make sure that you have same configurations applied on the ports which you are bundelling in an ether-channel group. Configs like trunk config, STP config, Speed/duplex configs have to be exactly same on all the ports in an ether-channel config.
Please see that link below and it will come handy.
I did try this configuration. But I have a total of 12 Ports that need to group, as far as i know, each channel-group is only allowed of 8 physical port to join, I can create another channel-group like group 2, but how I can combine group 1 and group 2 as one logical port, so that even I remove all the connection and leave only 1 link from S1 to S3 to S2, I can still ping the HostB(S2) from HostA(S1) without a timeout. Thanks
Good day, I will tell you the exact configuration of this scenario. I have 3 Cisco Switches 2950G-12-EI. S1/P1 connected to HostA, S1/P2 to S2/P2, S1/P3 to S3/P3, S3/P4 to S2/P4, S2/P1 to HostB. I want another redundant looping, which is S1/P5 to S2/P5, S1/P6 to S3/P6, S3/P7 to S2/P7. While im pinging from HostA to HostB then I shutdown all the connections of S1 to S2, including the one connection from S1 to S2 and S2 to S3, I will not encounter a timeout. I did try this succesfully using a 2 Switches 2950G-12-EI, connected with a redundant cable. I used a command of #channel-group 1 mode on the 4 ports of S1 and S2, then I did not encounter a timeout. But when I applied this channel-group using 3 Switches scenario, the S3 switches is shutting down. Im aware the each group are only allowed of eight physical group on each channel-group. Please let me know if you have other idea if how I can solve this. Thank you very much and I will wait for your reply, Nes of Riyadh, Saudi Oger.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...