05-17-2003 08:38 AM - edited 03-02-2019 07:25 AM
when I configure a subinterface of the interface fastethernet 0/1 in router 2621 ,it is error ,as follow:
"Router(config-subif)#ip address 210.37.16.16 255.255.255.0
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."
router 2621 ios :
"IOS (tm) C2600 Software (C2600-I-M), Version 12.2(8)T5, RELEASE SOFTWARE (fc1)
ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)
cisco 2621XM (MPC860P) processor (revision 0x100) with 125952K/5120K bytes of memory."
how to do ?
05-17-2003 09:12 AM
Are you configuring sub interfaces for inter vlan routing ?
Then you need to configure encapsulation for the sub interfaces as follows
int fa0/0.10
description vlan 10
encapsulation isl 10 (you can use dot1q instead of isl also)
ip add <> <>
int fa0/0.20
description vlan 20
encapsulation isl 20
ip add <> <>
05-17-2003 09:49 AM
yes,I configure subinterfaces .and I do all as you ,but there is not the "encapsulation "command
as follows:
2621#config
2621(config)#interface fas 0/1.1
2621(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
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 HSRP interface configuration commands
timeout Define timeout values for this interface
................................
as so that ,then what to do ?
05-17-2003 10:01 AM
Your IOS is 12.2(8)T5. This IOS does support ISL and 802.1q trunking. But that depends on the feature set used. For this feature to be available on the IOS, a minimum of IP Plus feature set should be used. I dont know if you are using IP only feature set. Please paste the name of the IOS image file you are using. It would look like this....(this is a sample c2600-is-mz.12.2-8.T5). From that we can determine, the feature set of the IOS.
Hope that helps!
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