Portfast does not disable spanning-tree. It is meant for connections between an endstation PC and a switch. Upon PC startup the link immediately goes into forwarding mode. If a loop did exist the link would transition to blocking. > -----Original Message----- > From: Patricia Leeb-Hart [mailto:[EMAIL PROTECTED]] > Sent: Friday, August 24, 2001 12:33 PM > To: [EMAIL PROTECTED] > Subject: Re: Problem Using external routers to route between VLANs > [7:17166] > > > Hamid, > Don't know if you've already seen this, but check out > > http://www.cisco.com/warp/public/473/50.shtml#cisco2600 > > From what I see on this page, it would appear that a > FastEthernet port is > required for interVLAN routing. > > BTW, group, I noticed in the configuration section of this > page that there's > this statement on the two switch interfaces being trunked: > > spanning-tree portfast > > I was told that PORTFAST disabled spanning-tree?? Have I > been given bogus > information or is this possible on the swtich model given (3512-XL)? > > >>> "Hamid" 08/22/01 01:28AM >>> > Hi group, > > I was wondering if it is A MUST for the external routers's > interface to be a > 100Mb interface, is it possible to do the InterVlan routing > on an ethernet > port (10Mb) on a 2600 router? > > I tried to setup a simple scenario with my 2600 router in my home lab, > setting the port connected to the 2600 router to TRUNK mode with isl > encapsulation , and allowing all vlans. But when I tried to > confgure the > router's sub-interfaces I the following errors: > > Router3(config)#int ethernet 0/0.2 > Router3(config-subif)#ip address 10.10.2.1 255.255.255.0 > > Configuring IP routing on a LAN subinterface is only allowed if that > subinterface is already configured as part of an IEEE 802.10, > IEEE 802.1Q, > or ISL vLAN. > > The other problem was that inthe SUBIF configuration mode I > didn't have the > ENCAPSULATION command available. > > Bellow is the output of the show version command: > Router3#sh ver > Cisco Internetwork Operating System Software > IOS (tm) C2600 Software (C2600-IO3-M), Version 12.2(3), > RELEASE SOFTWARE > (fc1) > Copyright (c) 1986-2001 by cisco Systems, Inc. > Compiled Wed 18-Jul-01 17:11 by pwade > Image text-base: 0x80008088, data-base: 0x809C818C > > ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) > > Router3 uptime is 6 hours, 3 minutes > System returned to ROM by reload > System image file is "flash:c2600-io3-mz.122-3.bin" > > cisco 2610 (MPC860) processor (revision 0x203) with > 28672K/4096K bytes of > memory. > Processor board ID JAD04390FCB (93659888) > M860 processor: part number 0, mask 49 > Bridging software. > X.25 software, Version 3.0.0. > 1 Ethernet/IEEE 802.3 interface(s) > 2 Serial(sync/async) network interface(s) > 32K bytes of non-volatile configuration memory. > 8192K bytes of processor board System flash (Read/Write) > > Configuration register is 0x2102 > Report misconduct > and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17175&t=17175 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
