Creating a trunk to Router Kills Connectivity

coolboarderguy · ‎07-25-2005

Hi All,

have set up 2 routers/2 switches. SW1(3500-192.168.168.2) connects to R1(2600-192.168.168.1) via network 192.168.168.0 and R1(192.168.169.2) connects to R2(2600-192.168.169.1) via network 192.168.169.0. SW2(3500-192.168.167.2) is connected to R2(192.168.167.1) via network 192.168.167.0. All were pingable and all were telnetable after adding ip host info. I have set SW2 as vtp client and SW1 as server and both are in the status vtp domain. I then created a trunk on fasteth0/12 on SW1 which has a straight cable running to fasteth0/1 on R1. After doing so, I can't ping R1 or ping SW1 from R1. What have I not done right..? Cheers.

coolboarderguy...

Georg Pauwen · ‎07-25-2005

Hello,

possibly there is a native VLAN mismatch between the router R1 and the switch SW1, can you post the configurations of both devices ?

Regards,

GP

rdijkink · ‎07-25-2005

Hi,

Normally when I do something like that, I create subinterfaces with the on the subinterface the following command: encapsulation isl/dot1q vlan-id.

So in this case (assuming you use on the switch vlan1 as the management vlan):

int f1/0.1

encapsulation dot1q 1

ip address 192.168.168.2 255.255.255.0

no shut

You also need to lose the ip address on f0/1 (no ip address)

regards

coolboarderguy · ‎07-25-2005

Hi All,

ok, let me understand this better(as the 2 books I have, Cisco Press' CCNA Intro and Que Certification ExamCram2 show nothing about it). To create a trunk from a switch to a router, I need sub-interfaces on the switch..? What about the router.? Speaking of the router, what are the commands to create a trunk.? Cheers.

coolboarderguy...

EDIT:

Tried creating the sub-interfaces, but, not possible on 3500 XL-EN

Toy(config)#int f1/0.1

^

% Invalid input detected at '^' marker.

Toy(config)#int fasteth0/0.1

^

% Invalid input detected at '^' marker.

Toy(config)#

coolboarderguy · ‎07-25-2005

Hi All,

oops, was I supposed to create the sub-interfaces on the router, not the switch.? lol...anyone got a link to a tutorial for this..? This page,

http://www.cisco.com/en/US/products/sw/iosswrel/ps1826/products_configuration_guide_chapter09186a00800880fa.html

goes into everything except ethernet. And this page,

http://www.ciscopress.com/articles/article.asp?p=102157

doesn't tell you how to configure the router for all of this. Truly poor, indeed. Cheers.

coolboarderguy...

milan.kulik · ‎07-25-2005

Hi,

here are step-by-step instructions:

http://www.cisco.com/warp/customer/473/50.shtml#Tools

(http://www.cisco.com/warp/customer/473/50.pdf for .pdf version).

Regards,

Milan

coolboarderguy · ‎07-25-2005

Hi All,

great thanx, but, I get this error message,

Authentication Required/Forgotten Password

Message #401: Authorization Required/Forgotten Password

The page you are trying to access requires a Cisco.com login and password. You have reached this page because you have either entered an invalid name/password combination or you have forgotten your password.

Please see the information below regarding Cisco.com registration or re-try your login.

http://www.cisco.com/warp/customer/473/50.shtml#Tools

Is this a different login to the forums one..? Cheers.

coolboarderguy...

coolboarderguy · ‎07-25-2005

Hi All,

I tried the following,

Tom#conf term

Enter configuration commands, one per line. End with CNTL/Z.

Tom(config)#int fasteth0/1.1

Tom(config-subif)#ip address 192.168.168.1 255.255.255.0

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.

Tom(config-subif)#?

How do I set the sub-inteface to the vlan, to then be able to set the ip address.? Cheers.

coolboarderguy...

milan.kulik · ‎07-25-2005

Well,

if you don't have a CCO login account, try

http://www.cisco.com/warp/public/473/50.shtml

or http://www.cisco.com/warp/public/473/50.pdf

Regards,

Milan

coolboarderguy · ‎07-26-2005

Hi All,

thanx. I knew I was close. May I ask, either, what parameters did you use in google to get this, or where on this site did you access/find this..? Cheers.

coolboarderguy...

Tom#conf term

Enter configuration commands, one per line. End with CNTL/Z.

Tom(config)#int fasteth0/1.1

Tom(config-subif)#encapsulation isl 1

^

% Invalid input detected at '^' marker.

Tom(config-subif)#?

Interface configuration commands:

arp Set arp type (arpa, probe, snap) or timeout

backup Modify backup parameters

bandwidth Set bandwidth informational parameter

bridge-group Transparent bridging interface parameters

carrier-delay Specify delay for interface transitions

cdp CDP interface subcommands

default Set a command to its defaults

delay Specify interface throughput delay

description Interface specific description

exit Exit from interface configuration mode

ip Interface Internet Protocol config commands

llc2 LLC2 Interface Subcommands

mtu Set the interface Maximum Transmission Unit (MTU)

netbios Use a defined NETBIOS access list or enable name-caching

no Negate a command or set its defaults

ntp Configure NTP

rate-limit Rate Limit

service-policy Configure QoS Service Policy

shutdown Shutdown the selected interface

snapshot Configure snapshot support on the interface

standby Hot standby interface subcommands

timeout Define timeout values for this interface

traffic-shape Enable Traffic Shaping on an Interface or Sub-Interface

What am I doing wrong here.? Cheers, again.

Tom#sh ver

04:33:48: %SYS-5-CONFIG_I: Configured from console by console

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-I-M), Version 12.0(5)T1, RELEASE SOFTWARE (fc1)

Compiled Tue 17-Aug-99 13:57 by cmong

Image text-base: 0x80008088, data-base: 0x8072C5D4

ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

Tom uptime is 4 hours, 33 minutes

System returned to ROM by power-on

System image file is "flash:c2600-i-mz.120-5.T1.bin"

cisco 2621 (MPC860) processor (revision 0x600) with 26624K/6144K bytes of memory.

Processor board ID JAD05350GL0 (1693552103)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

2 FastEthernet/IEEE 802.3 interface(s)

1 Serial network interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

milan.kulik · ‎07-26-2005

Hi,

1) I found this documet three years ago on CCO,

2) you need an IP Plus Feature Set IOS on your router to configure trunks.

Encapsulation isl 1

command is not available in IP Feature Set.

Regards,

Milan

coolboarderguy · ‎07-26-2005

Hi All,

oh, so, this router(ios) is no good.? Okay, how do I confirm if an IOS has the IP Plus Feature Set.? Cheers.

coolboarderguy...

Georg Pauwen · ‎07-26-2005

Hello,

as Milan stated, the IP Plus feature set is required. You can recognize it by the image name, it contains ´is´, e.g.:

System image file is "flash:c2600-is-mz.120-5.T1.bin"

In your case, you have the IP Only feature set (as seen in the output of ´sh ver´:

System image file is "flash:c2600-i-mz.120-5.T1.bin"

Regards,

GP

coolboarderguy · ‎07-26-2005

Hi All,

ok, thanx. Is it possible to download the is version, for free..? I don't, naturally, have a licence. Cheers.

coolboarderguy...

coolboarderguy · ‎07-26-2005

Hi All,

this url,

http://www.cisco.com/public/sw-center/sw-ios.shtml

has Lan Switching Software, but, I see nothing for Routers. Surely, if they offer archived IOS for switching devices, they would do the same for Routers, no..? Cheers.