i Scott, I ran a debug with port fast enabled and not enabled and is as shown below.
IEEE Protocol (802.1D) [Forward delay set to 12 seconds] 01-11-2008 19:20:33 Local7.Debug 1xx.27.188.34 1044: 2w4d: STP: VLAN0100 Fa1/0/13 -> forwarding 01-11-2008 19:20:27 Local7.Debug 1xx.27.188.34 1037: 2w4d: STP: VLAN0100 Fa1/0/13 -> learning 01-11-2008 19:20:21 Local7.Debug 1xx.27.188.34 1028: 2w4d: STP: VLAN0100 Fa1/0/13 -> listening interface FastEthernet1/0/13 switchport access vlan 100 end IEEE Protocol (802.1D) [Forward delay set to 12 seconds PF-enabled] 01-11-2008 19:23:57 Local7.Error 1xx.27.188.34 1064: 2w4d: %LINK-3-UPDOWN: Interface FastEthernet1/0/13, changed state to up 01-11-2008 19:23:55 Local7.Debug 1xx.27.188.34 1060: 2w4d: STP: VLAN0100 Fa1/0/13 ->jump to forwarding from blocking 01-11-2008 19:23:53 Local7.Debug 1xx.27.188.34 1055: 2w4d: STP: VLAN0100 Fa1/0/13 ->jump to forwarding from blocking interface FastEthernet1/0/13 switchport access vlan 100 spanning-tree portfast end Without portfast, the forward delay was a expected 12 seconds as per the time stamps of the log. But with portfast, the port jumped to forwarding immediately after I plugged in the PC. By the way, I am using a CAT3750 Switch. Are things different with CAT3550/60? Sharath On 1/10/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > Send CCIE_RS mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://onlinestudylist.com/mailman/listinfo/ccie_rs > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CCIE_RS digest..." > > > Today's Topics: > > 1. Re: CCIE_RS Digest, Vol 24, Issue 4 (Amit Singh) > 2. Re: CCIE_RS Digest, Vol 24, Issue 4 (Scott Morris) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 10 Jan 2008 11:46:26 +0530 > From: "Amit Singh" <[EMAIL PROTECTED]> > Subject: Re: [OSL | CCIE_RS] CCIE_RS Digest, Vol 24, Issue 4 > To: [email protected] > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Team, > > Here is one question that Iis confusing me : > > Configure SW 1 Port fa 0/18 in vlan 26 so that the TOTAL link start delay > (till the port becomes forwarding) is 12 seconds ? > > according to me the answer for this should be " spanning-tree vlan 26 > forward-time 6 " . > > What would be your answer? Any comments ? > > -as > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20080110/05771f1d/attachment-0001.html > > ------------------------------ > > Message: 2 > Date: Thu, 10 Jan 2008 09:05:55 -0500 > From: "Scott Morris" <[EMAIL PROTECTED]> > Subject: Re: [OSL | CCIE_RS] CCIE_RS Digest, Vol 24, Issue 4 > To: "'Amit Singh'" <[EMAIL PROTECTED]>, <[email protected]> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="us-ascii" > > You'd also need portfast. > > On a "regular" link coming up without portfast enabled, you also need to > have the blocking timer in there (20 seconds) which makes a TOTAL link start > delay of 12 seconds impossible. > > Other than blocking, yes, listening + learning gives the solution you have > there. > > So it sounds like you already understand the technology. So the point of > the question is? Whose lab is it? > > > > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M > #153, JNCIS-ER, CISSP, et al. > CCSI/JNCI-M/JNCI-ER > VP - Technical Training - IPexpert, Inc. > IPexpert Sr. Technical Instructor > > A Cisco Learning Partner - We Accept Learning Credits! > > [EMAIL PROTECTED] > > > > Telephone: +1.810.326.1444 > Fax: +1.810.454.0130 > http://www.ipexpert.com > > > > > _____ > > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Amit Singh > Sent: Thursday, January 10, 2008 1:16 AM > To: [email protected] > Subject: Re: [OSL | CCIE_RS] CCIE_RS Digest, Vol 24, Issue 4 > > > Hi Team, > > Here is one question that Iis confusing me : > > Configure SW 1 Port fa 0/18 in vlan 26 so that the TOTAL link start delay > (till the port becomes forwarding) is 12 seconds ? > > according to me the answer for this should be " spanning-tree vlan 26 > forward-time 6 " . > > What would be your answer? Any comments ? > > -as > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://onlinestudylist.com/pipermail/ccie_rs/attachments/20080110/3d0040b9/attachment-0001.html > > End of CCIE_RS Digest, Vol 24, Issue 9 > ************************************** >
