Rapid-pvst still taking 30secs to converge

[Matthew Lucas]

Guys,

I'm a little confused here. I've set all my switches (mix of 3750X, 2960S & CG and 3560CG) to rapid-pvst, yet whenever I plug in a new device, it still takes 30 secs for the switch to start allowing communications. My understanding was that rapid-pvst is a variation on rstp, which should take 3 seconds to converge.

The syntax I've used is:

#spanning-tree mode rapid-pvst

Have I missed anything?

Thanks in advance,

Matt

[paul driver]

Hello

when you say "plug in a new device" do you mean into an access port? If so - Do you have portfast enabled?

Sh span summary

Res

Paul

Please don't forget to rate any post that may have been helpful

[Matthew Lucas]

Paul - yes, into an access port, and no, I don't have portfast enabled (that was intentional, but I'm open to suggestions).

ASW24#sh span summary

Switch is in rapid-pvst mode

Root bridge for: none

EtherChannel misconfig guard is enabled

Extended system ID           is enabled

Portfast Default             is disabled

PortFast BPDU Guard Default  is disabled

Portfast BPDU Filter Default is disabled

Loopguard Default            is disabled

UplinkFast                   is disabled

BackboneFast                 is disabled

Configured Pathcost method used is short

Name                   Blocking Listening Learning Forwarding STP Active

---------------------- -------- --------- -------- ---------- ----------

VLAN0001                     1         0        0          1          2

VLAN0004                     1         0        0          1          2

VLAN0008                     1         0        0          1          2

VLAN0016                     1         0        0          1          2

VLAN0020                     1         0        0          1          2

VLAN0024                     1         0        0          1          2

VLAN0028                     1         0        0          1          2

VLAN0032                     1         0        0          1          2

Name                   Blocking Listening Learning Forwarding STP Active

---------------------- -------- --------- -------- ---------- ----------

VLAN0036                     1         0        0          1          2

VLAN0244                     1         0        0          1          2

VLAN0248                     1         0        0          1          2

VLAN0252                     1         0        0          1          2

---------------------- -------- --------- -------- ---------- ----------

12 vlans                    12         0        0         12         24

ASW24#

[paolo bevilacqua · Accepted solution]

As suggested above, you need to configure portfast. Access port is independant from the rest of Rapid STP features.

[Matthew Lucas]

Ok, fair enough. That solves that question, haha. I've got another issue which I'll start a new thread for too. Thanks very much guys.