I read port fast should be enabled on switch ports that coonect to single hosts.
here in this network
switch config is
idltvs1#sh spanning-tree int fa0/2
Interface Fa0/2 (port 14) in Spanning tree 1 is FORWARDING
Port path cost 19, Port priority 128
Designated root has priority 32768, address 0005.3296.7680
Designated bridge has priority 32768, address 0005.3296.7680
Designated port is 14, path cost 0
Timers: message age 0, forward delay 0, hold 0
BPDU: sent 3049, received 2
The port is in the portfast mode
This port da0/2 goes to router
sh cdp nei fa0/2 detail
Device ID: idltvr1.williams.com
IP address: 188.8.131.52
Platform: Cisco 2811, Capabilities: Router Switch IGMP
Interface: FastEthernet0/2, Port ID (outgoing port): FastEthernet0/1
Holdtime : 178 sec
Cisco IOS Software, 2800 Software (C2800NM-ADVSECURITYK9-M), Version 12.4(3e), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Tue 13-Jun-06 23:24 by alnguyen
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router config is
Cisco 2811 (revision 53.51) with 249856K/12288K bytes of memory.
Processor board ID FTX1028A28P
2 FastEthernet interfaces
2 Serial(sync/async) interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62720K bytes of ATA CompactFlash (Read/Write)
My question is why we enable port fast on port going to router also second question is why switchport fa0/2 has sent so many bpdu to router .as i know bpdu is exchanged between switches only.
router has sent only 2 bpdu back to switch