I am trying to create redundancy between 6509 and two 3548XLs. I have a 6509 w/ dual sup1a and msfc in one closet and two 3548xl (3548xl-1 and 3548xl-2)switches in another closet. I initially created fiber trunks to each separate 3548xl and it worked fine, but if one fiber link fails, one switch also fails. Is there a way to configure these switches so that there may be one trunk going from 6509 to 3548xl-1 and another trunk going from 6509 to 3548xl-2 while linking the two 3548xls with a gigastack module? Or is there a simpler way to create redundancy between these switches using 2 fiber trunks and/or gigastack modules?
Re: question about trunking and redundancy for 6509s
I would run two connections from your 6509 to each of your 3548s. Create a 2gig port-channel from the 6509 to the 3548xl. This way if one of your gig links fail, the port channel will stay up and you will still have a one gig link...and there is no need for a spanning tree recalculation. This is b/c spanning tree treats the port-channel as one logical link. If need be you can then enable trunking (allowing of more than one vlan) over the port-channel. Also, I would use dot1q encapsulation for your trunking.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.