06-22-2009 02:49 AM - edited 03-06-2019 06:22 AM
Hi !
I'm currently prepared my CCNP BSCI Certification Exam. I own some old Cisco router devices which I use as a small studdy lab. But a lot of them have only on ethernet connector. I would configure those as router on a stick.
When I try to setup ip address on sub-interface I received the following message : "
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."
I try to find how I can configure the interface for ISL encapsulation..... I one documentation on the web I find I should use "encapsulation isl #vlan" command in the sub-interface mode. But in the command listed in the sub-interface mode encapsulation command is not available :
R2(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
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
on the interface mode I nothing about encapsulation also !!
here is running plate-form :
R2#sh ver
System returned to ROM by reload
System image file is "flash:c1600-oy-mz.121-6.bin"
also with 2500 Cisco router which cable type I can buy to connected them each other by there serial connector ?? (I know this configuration is most ofter use in lab and is not ofter implemented in production network)
could some help me ??
06-22-2009 03:09 AM
Hello Christian,
check if the following is supported
int et0/0.10
enc dot1q 10
ip address 10.10.10.1 255.255.255.0
the message says that you need to specify to what broadcast domain (Vlan-id) the subinterface is associated.
Actually the subinterface index is one thing the L2 vlan association requires the encapsulation command
eventually verify if
enc isl 10
is supported
if one of the command versions is supported you can have your router on a stick.
the switch port needs to be configured as a L2 trunk with matching encapsulation
int f0/5
switchport
switchport trunk enc dot1q
switchport mode trunk
switchport trunk allowed vlan 10,20,30
b) about back to back connection with V.35 you need a DTE cable and a DCE cable.
see
http://www.cisco.com/en/US/docs/routers/access/hardware/notes/marcabl.html#wp39257
Hope to help
Giuseppe
06-24-2009 11:32 AM
Hi !
my router do not support :
int et0/0.10
but support command :
int et0.10
in this sub interface mode, no encapsulation command is support... look like encapsulation ISL is not support on this router... But what I had find bizzard, is why when I try to setup ip address on this same interface router, the errors messages aks me to setup ISL encapsulation on this same interface, what is looklike not supported ??
this a lot for cable description, I will order thoses from my supplier thomorrow...
06-24-2009 12:35 PM
Christian,
Your IOS is pretty old. c1600-oy-mz.121-6.bin. As I recall, Ethernet(10Mbps) doesn't support 802.1q encapsulation. It can be done on some code for C25xx or C26xx (Regarding Ethernet(10M). Fastethernet is fine.
However,ISL encapsulation, it doesn't support on C16xx as well. How can I know? Well, here you go : http://www.cisco.com/go/fn
That is my default homepage on IE. J/K(grin)
HTH,
Toshi
06-24-2009 04:43 PM
yes I know my IOS is pretty old, I use old devices as a small lab. I don't have the budget to buy new material to complete my CCNP certification by my self !! at the office we don't have access to a lab or production environment on which I can hope to have the necessaily configuration to understanding requirement of the BSCI exam certification....
As I understand router on the stick configuration will be not possible with this IOS version...
Thanks a lot for the like you had provide to me !
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