Buy or Renew
Buy or Renew
Cisco + Splunk: It’s a new day for your data. Learn more.
 
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
1381
Views
4
Helpful
2
Replies

Spanning Tree Portfast

Go to solution
townofnewmarket
Level 1
Level 1

‎12-04-2008 06:45 AM - edited ‎03-06-2019 02:48 AM

I have a 3560G that is the def gw for most of my net, as well as root of Spanning Tree. All my sites connect into this box via fiber, most of the main servers plug into this box, as well as Unity and CCM, etc.

Anyways, here is one port:

interface GigabitEthernet0/5

description Connection to PIX Firewall

spanning-tree portfast

Should I have portfast set on this port? Any harm by taking it off?

Labels:
0 Helpful
1 Accepted Solution

Accepted Solutions
2 Replies 2

Go to solution
Giuseppe Larosa
Hall of Fame
Hall of Fame

‎12-04-2008 06:54 AM

Hello Doug,

spanning-tree is useful on user ports : that includes ports where router or firewall connects.

If the PIX is acting as a routed firewall it is not transparent you can keep it

STP portfast reduce the time to STP forwarding state knowing that no switch is connected on the port so it is useful on PCs and workstations to reduce time to up.

It also provide more STP stability: a change of state in a portfast port doesn't trigger a topology change notification

This avoids a useless STP recalculation.

Hope to help

Giuseppe

Customers Also Viewed These Support Documents
Review Cisco Networking products for a $25 gift card