Can I trunk the ISR 1100 and Catalyst 3560 using the ISR WAN/LAN port?

jupiter.jones · ‎04-10-2022

Like in the title I have an ISR1100 Router with 8 port switch and an additional 2 x LAN/WAN GigEth ports.

I have 8 devices connected to the switch, and a WAN connected to one of the LAN/WAN ports, leaving 1 LAN/WAN ports free.

I would like to trunk that available port to one of the ports on the Catalyst 3560.

However, it appears the LAN/WAN ports don't support the switchport command (or the encapsulation command).

Does anyone know if it's possible to use that ISR LAN/WAN port to create a trunk to the 3560?

If it is possible, is there some documentation or a configuration example somewhere I can check out?

Thanks for your time.

balaji.bandi · ‎04-10-2022

here is the sample config you can do Router and Switch side :

https://www.cisco.com/c/en/us/support/docs/lan-switching/inter-vlan-routing/14976-50.html

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jupiter.jones · ‎04-10-2022

Hey. Thanks for the reply.

Sadly interface GigabitEthernet 0/0/1 also doesn't support the command encapsulation so the solution that works on the 2600 can't be entered on the ISR1100

Any other ideas?

balaji.bandi · ‎04-10-2022

I am sure that the device should support it, don't have a device in hand to test.

interface GigabitEthernet 0/0/1

no IP address

no shutdown

interface GigabitEthernet 0/0/1.1

encapsulation dot1Q 10

You still can't find working - can you post

show version

show interface GigabitEthernet 0/0/1 capabilities

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jupiter.jones · ‎04-10-2022

router#show version

Cisco IOS XE Software, Version 16.12.04

Cisco IOS Software [Gibraltar], ISR Software (ARMV8EL_LINUX_IOSD-UNIVERSALK9-M), Version 16.12.4, RELEASE SOFTWARE (fc5)

Technical Support: http://www.cisco.com/techsupport

Compiled Thu 09-Jul-20 20:16 by mcpre

...

ROM: 16.12(2r)

router uptime is 1 week, 6 days, 4 hours, 33 minutes

Uptime for this control processor is 1 week, 6 days, 4 hours, 34 minutes

System returned to ROM by Reload Command at 17:21:12 AEDT Mon Mar 28 2022

System restarted at 17:23:44 AEDT Mon Mar 28 2022

System image file is "bootflash:c1100-universalk9.16.12.04.SPA.bin"

Last reload reason: Reload Command

...

Suite License Information for Module:'esg'

--------------------------------------------------------------------------------

Suite Suite Current Type Suite Next reboot

--------------------------------------------------------------------------------

FoundationSuiteK9 None Smart License None

securityk9

appxk9

Technology Package License Information:

-----------------------------------------------------------------

Technology Technology-package Technology-package

Current Type Next reboot

------------------------------------------------------------------

appxk9 None Smart License None

uck9 None Smart License None

securityk9 None Smart License None

ipbase ipbasek9 Smart License ipbasek9

The current throughput level is unthrottled

Smart Licensing Status: REGISTERED/AUTHORIZED

cisco C1111-8PLTELAWZ (1RU) processor with 1398091K/6147K bytes of memory.

Processor board ID FGL2447L3P9

4 Virtual Ethernet interfaces

11 Gigabit Ethernet interfaces

2 Cellular interfaces

32768K bytes of non-volatile configuration memory.

4194304K bytes of physical memory.

2945023K bytes of flash memory at bootflash:.

0K bytes of WebUI ODM Files at webui:.

Configuration register is 0x3922

router#show interface GigabitEthernet 0/1/1 capabilities

GigabitEthernet0/1/1

Model: C1111-ES-8

Type: 10/100/1000BaseTX

Speed: 10,100,1000,auto

Duplex: half,full,auto

Trunk encap. type: 802.1Q

Trunk mode: on,off,desirable,nonegotiate

Channel: yes

Broadcast suppression: none

Flowcontrol: rx-(off,on),tx-(none)

Fast Start: yes

QoS scheduling: rx-(not configurable on per port basis),

tx-(4p4q0t)

CoS rewrite: yes

ToS rewrite: no

UDLD: no

Inline power: no

SPAN: source/destination

PortSecure: no

Dot1x: yes

Multiple Media Types: rj45

router#show interface GigabitEthernet 0/0/1 capabilities

Not available for WAN ports or VLAN interfaces

Jon Marshall · ‎04-10-2022

int gi0/1/1
switchport

then try.

Jon

jupiter.jones · ‎04-10-2022

Hi Jon,

Thanks for your reply.

As I mentioned in the original post, that interface doesn't respond to switchport. That's where my issue started

router(config)#int GigabitEthernet 0/0/1
router(config-if)#switchport ?
% Unrecognized command

To clarify, your response mentioned GigabitEthernet 0/1/1 - which is a port on the ISR1100 "switch". That does respond to switchport.

Since all my "switch" ports are used, I'm wanting to know if it's possible to run the trunk from the ISR1100 to the C3560 using the available WAN/LAN port GE0/0/1.

jupiter.jones · ‎04-10-2022

Hi Balaji,

I got another step. Not sure why I couldn't create the sub-interface last night. I ended up adding it in the webui then I could use it in the CLI. regardless.

On the router...

interface GigabitEthernet0/0/1
 description Trunk to Switch
 no ip address
 negotiation auto
!
interface GigabitEthernet0/0/1.1
 encapsulation dot1Q 99

on the switch...

interface GigabitEthernet0/24
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 99
 switchport mode trunk
 power inline never

The connection is up. Not sure what I need to do now to bridge vlan101 and vlan102 through the trunk. Not sure of the language I should use to describe this either

I created a "management" vlan99 for the trunk ports, but it been so long since I've set one of these up, I can't remember why

Jon Marshall · ‎04-11-2022

Do you mean bridge or do you just mean route the vlans on the router ?

Assuming the latter you just create more interfaces on the router as you did with vlan 99 and the trunk is already allowing those vlans. #

Jon

jupiter.jones · ‎04-11-2022

I'm not sure what language to use to describe it.

What I want is essentially extend the existing vlans on the ISR to the Catalyst 3560.

ie. I want anything connected to a vlan101 port on the ISR to be able to send and receive data from anything connected to a vlan101 port on the 3560. I want Bonjour messages sent from devices on the 3560 to get responses from devices connected to the ISR.

Vlan102 is running Dante so devices connected to the 3560 should appear on the same subnet and those connected to the 3560 and be able to subscribe to broadcast messages.

Is that clear? What would you call that? Is this possible?

Jon Marshall · ‎04-11-2022

It is clear but I am not sure you can do that using one of the LAN/WAN ports.

You have two options as far as I can see -

1) use one of the ports from the 8 port switch and connect that to the 3560 as a trunk then you have a path from the 8 port switch to the LAN/WAN port you have used

2) again use one of the ports from the 8 port switch and connect to 3560 and then create L3 vlan interfaces on the switch instead of the LAN/WAN interface and you would then use the LAN/WAN interface to route traffic between the 3560 and the router.

Balaji may have some other suggestions.

Jon

jupiter.jones · ‎04-11-2022

Thanks Jon.

I thought that's what I might have to do. Since the switch already has 8 devices connected, was hoping I could do it using the WAN/LAN port.

I'll see if Balaji has any suggestions, in the mean time I'll see what device they are happy to remove for now.

Thanks again for your help.

balaji.bandi · ‎04-11-2022

there some confusion your post, first you tried 0/0/1, next message i see 0/1/1 - i was bit confused.

Hope @Jon Marshall help to resolve the issue here i guess, anything we missing here or not working ?

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jupiter.jones · ‎04-11-2022

Yes sorry about the confusion. The port I'd like to use is GE0/0/1 - the LAN/WAN port. This is simply because all the switch ports are currently in use. But I'm guessing that's not possible?

If there's no way to achieve this with the LAN/WAN port, I'll have to use one of the switch ports - I think I know what I'm doing there. Will be testing that tomorrow.

balaji.bandi · ‎04-11-2022

Sure please let us know any help required.

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