Let's see if anyone can figure this one out:
Running into an interesting problem with trunking. We
have multiple setups running this configuration and
running into CRC's on the trunk ports, and slow
transfer and corrupted files sent inbetween the vlans.
Currently we have had 2 ccie from cisco look at it
with no help, and TAC has been working it for 5 days
with no luck so far. We have 50 locations with this
setup and 6 of them are reporting corrupted files.
There is a 3640 router with 2FE and the switch is
either a 3524xl or 3548XL, all code, cards, memory and
flash are identical.
The 3640 is setup as follows:
interface FastEthernet0/1
no ip address
no cdp enable
speed 100
duplex full
no ip directed-broadcast
interface FastEthernet0/1.1
description Trusted Network
encapsulation isl 1
no ip directed-broadcast
no ip redirects
ip address x.x.x.1 255.255.255.128
interface FastEthernet0/1.2
description Display Network
encapsulation isl 2
no ip directed-broadcast
no ip redirects
ip address x.x.x.129 255.255.255.192
interface FastEthernet0/1.3
description untrusted Network
encapsulation isl 3
no ip directed-broadcast
no ip redirects
ip address x.x.x.193 255.255.255.192
The 3524XL or 3548XL is configured as follows:
interface fast ethernet 0/24
description router
speed 100
duplex full
switchport mode trunk
The CRC increment atleast 1 every 7 secs. The more
data that gets transfere, the worse it gets. We also
see CRC's on port 23 which is the server. I tried
switching from isl trunking to dotq and that appeared
to slow down the CRC, but that is it.
Anybody have any ideas?
Rick Thompson
CCNA, MCSE
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