Re: Cisco Switch/Router configuration help.

"Thrill5" <nospam@xxxxxxxxxxxxx> wrote in
news:O6-dnSPJyKn2qKTanZ2dnUVZ_oytnZ2d@xxxxxxxxxxx:

Ethernet interfaces (10 MB) on Cisco (like 2610, 2611 and 2500 series)
devices do not support dot1q or ISL, because the hardware chipsets
they use do not support this functionality. It is a bug in the IOS
software that allows you to even configure this. Another common IOS
"bug" is setting duplex to full on these same device's 10 MB
interfaces. You can set it, and a "show interface" will show the
interface in full duplex mode, but again full duplex is not supported
on the hardware on these 10MB interfaces and you will get errors.

"Jimsu" <jimsu1973@xxxxxxxxx> wrote in message
news:1194878211.779265.70140@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hello,

I've done some cisco configurations in the past without much issue.
Usually, between books and the internet, I can figure just about any
of them out.. but this one is stumping me. Perhaps there's an IOS
issue (like I have the wrong one), or perhaps it's pebkac.

I am trying to setup a sample network, or networks. I'm trying to
configure a Cisco 26xx router, with one ethernet interface, with 2
sub interfaces on different networks (192.168.2.xx/24 and
192.168.248.xx/ 24). On each of the subinterfaces I've added the
router ip addresses.

On the switch (cisco 2950) I've put the port into trunk mode (same
with the main interface on the router). i've added the ports to the
appropriate vlans, but I'm getting no connectivity.

If anyone can please advise, and/or provide a link to further
resources, I would appreciate it. Here are the devices and configs:

Cisco 2950:

eanut_sw1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA4,
RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Wed 23-Mar-05 15:33 by yenanh
Image text-base: 0x80010000, data-base: 0x80562000

ROM: Bootstrap program is C2950 boot loader

eanut_sw1 uptime is 22 minutes
System returned to ROM by power-on
System restarted at 07:43:26 CDT Mon Nov 12 2007
System image file is "flash:/c2950-i6q4l2-mz.121-22.EA4.bin"

cisco WS-C2950G-24-EI (RC32300) processor (revision L0) with 21039K
bytes of memory.
Processor board ID FOC0937Z6KN
Last reset from system-reset
Running Enhanced Image
24 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:15:63:73:1B:40
Motherboard assembly number: 73-7280-05
Power supply part number: 34-0965-01
Motherboard serial number: FOC09371F6S
Power supply serial number: PHI0931C2MW
Model revision number: L0
Motherboard revision number: A0
Model number: WS-C2950G-24-EI
System serial number: FOC0937Z6KN
Configuration register is 0xF

Cisco 2610:

#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IK9O3S3-M), Version 12.3(10), RELEASE
SOFTWARE (fc3)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Tue 17-Aug-04 05:11 by kellythw
Image text-base: 0x80008098, data-base: 0x819E9FE4

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

uptime is 54 minutes
System returned to ROM by reload at 11:57:15 CST Tue Mar 2 1993
System image file is "flash:c2600-ik9o3s3-mz.123-10.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use
encryption. Importers, exporters, distributors and users are
responsible for compliance with U.S. and local country laws. By using
this product you agree to comply with applicable laws and
regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be
found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email
to
export@xxxxxxxxxx

cisco 2610 (MPC860) processor (revision 0x202) with 61440K/4096K
bytes of memory.
Processor board ID JAD041007W7 (1350106988)
M860 processor: part number 0, mask 49
Bridging software.
X.25 software, Version 3.0.0.
1 Ethernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Now onto the applicable configs:

2950 (the port Im plugging the switch into is fa0/1, so I stopped
there):

Current configuration : 2055 bytes
!
! Last configuration change at 08:33:33 CDT Mon Nov 12 2007
!
version 12.1
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime
!
hostname eanut_sw1
!
clock timezone CDT -6
ip subnet-zero
!
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
switchport mode trunk
!

Cisco 2510 config:

!
interface Ethernet0/0
no ip address
no ip unreachables
no ip proxy-arp
full-duplex
no cdp enable
!
interface Ethernet0/0.1
encapsulation dot1Q 1 native
ip address 192.168.2.99 255.255.255.0
no cdp enable
!
interface Ethernet0/0.2
encapsulation dot1Q 2
ip address 192.168.248.99 255.255.255.0
no cdp enable
!

with this setup, I cannot ping any devices on either network, and the
network cannot ping the .99 addresses assigned on the router. Please
advise. Hopefully, I'm just missing something obvious.

Thank you,

Jim Surles





There was an older T train version where dot1q was supported, it did the
tagging in SW. We used in on quite a few 2611s after memory upgrades. But
seems like I recall an issue with untagged traffic (native vlan).
You could try leaving vlan 1 the native, and move the ip from vlan 1 to a
new vlan (vlan 3) so that the traffic gets tagged and see if that works.

c
.

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