03-27-2006 12:54 PM - edited 03-03-2019 02:30 AM
Hello, I'm having a bit of a problem setting up a pair of VLANs on my existing network. I've only got one fastethernet interface going to my network. I need to keep the two VLANs apart. So here's my problem: when I try to configure the router (1721) for VLAN 2, I have no problem. But the moment I try to configure the subinterface for the original VLAN, everything stops working! Any help would be wonderful. Here's my current config:
Using 1138 out of 29688 bytes
!
version 12.3
service config
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname FV
!
boot-start-marker
boot-end-marker
!
enable secret xxxx
enable password xxxx
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
ip dhcp pool DHCPPool1
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.254.100
!
no ftp-server write-enable
!
!
!
!
interface FastEthernet0
ip address 192.168.254.17 255.255.255.0
speed auto
no cdp enable
!
interface FastEthernet0.1
no cdp enable
!
interface FastEthernet0.2
encapsulation dot1Q 2
ip address 192.168.1.1 255.255.255.0
ip access-group 101 out
!
interface Serial0
ip address 10.254.0.2 255.255.255.252
no fair-queue
service-module t1 remote-alarm-enable
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.254.0.1 permanent
no ip http server
!
snmp-server community xxxx
snmp-server enable traps tty
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
password xxxx
login
!
!
end
----------
And what I've been trying to make subinterface 0.1 look like is this:
interface FastEthernet0.1
encapsulation dot1q 1 native
ip address 192.168.254.17 255.255.255.0
ip access-group 100 out
--------
Then I'd add access-lists to keep the two VLANs from speaking to each other and hopefully VLAN 2 would be able to use the same DNS server.
Anyway, any and ALL help would be greatly appreciated!
03-27-2006 01:04 PM
Jackson
I believe the first thing is to determine if the version of IOS that you are running supports VLAN subinterfaces. Can you post the output of show version that shows the complete file name for the IOS that you are running (this will give both the version and the feature set).
HTH
Rick
03-27-2006 01:49 PM
Ah, that would be a good idea! Here's the output of show version:
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-IPBASE-M), Version 12.3(6c), RELEASE SOFTWARE (f)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Tue 20-Jul-04 07:00 by kellythw
Image text-base: 0x80008120, data-base: 0x80C74650
ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)
FV uptime is 1 hour, 7 minutes
System returned to ROM by reload
System image file is "flash:c1700-ipbase-mz.123-6c.bin"
cisco 1721 (MPC860P) processor (revision 0x400) with 55642K/9894K bytes of memo.
Processor board ID FOC09084LE0 (2748776065), with hardware revision 0000
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
WIC T1-DSU
32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
03-27-2006 07:44 PM
Hi
As per u r output from show version u r having a IPBASE image u need to have IP PLUS image.
Hope this helps
Mahmood
03-29-2006 06:26 AM
Okay, so you're saying that the IPBASE image doesn't support subinterfaces, but that if I were to upgrade it to the IPPLUS image that it would? Do you know if the 1721 is capable of running IP PLUS?
03-29-2006 06:30 AM
The 1721 is certainly capable of running IPPLUS feature set.
HTH
Rick
03-31-2006 09:07 AM
Now to figure out how to get that image. I'm an IT contractor for this company, so finding any sort of credentials for downloading should be challenging at best. Thanks!
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