As Dan said, Rapid PVST has the inbuilt feature of backfonefast, it do not require to be enabled explicitly. But not very sure what are adverse effects of enabling them explicitly. To me, your approach looked right.
You modified the STP priority (lowered down on 6509-2) & increased the HSRP priority on for those VLANs on 6509-2. but just to understand, the pc from which you saw packet drops to internet was in which VLAN?
I think Dan's questions would help better understanding the situation. Most important question is Who was the root before & after.
The source of the "interruption" was just my laptop on wireless (we have wisms in the 6509s). I was pinging 220.127.116.11 as a basic test of Internet connectivity and loss.
The port config was not an issue as it was a wism.
6509-1 is the normal root.
After we shut down 6509-1, 6509-2 became the root.
Once we brought 6509-1 back online, it stood back up as root. That's when we saw the loopguard logs from all of our downstream switches on all vlans. (syslog basically blew up).
To clarify, I DID NOT change the STP priority. As we were using RPVST, it was not necessary. This is the only site out of 8 others that freaked out. Every other site was smooth as silk. The only difference between these sites (templated) was the backbonefast legacy command. Somebody missed this site when they moved to RPVST and I didn't notice it before I did the work.
Also, I typo'ed the config a little. the 6509-2 STP priority is normally 16384 for all vlans, making it secondary.
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.