01-12-2016 06:33 AM - edited 03-05-2019 03:06 AM
hello , I have cisco 1841 router with IOS c1841-adventerprisek9-mz.151-3.T2.bin
I have problem with defaul Vlan , it doesn't exist, can you help me for this case?
this is output - sh ip int brief
CCNP#sh ip int brief
Interface IP-Address OK? Method Status Prot
ocol
FastEthernet0/0 192.168.2.200 YES NVRAM up up
FastEthernet0/1 unassigned YES NVRAM administratively down down
Serial0/0/0 unassigned YES NVRAM administratively down down
01-12-2016 07:55 AM
Hi there,
if you want to enable VLAN tagging on the interfaces you will need to configure them as sub-interfaces. Eg; If you wanted to create a router interface on fa0/0 in VLAN10 and tag those packets, try this configuration:
!
int fastethernet0/0.10
encapsulation dot1q 10
ip address 192.168.10.254 255.255.255.0
no shut
!
cheers,
Seb.
01-12-2016 08:31 AM
No, I want make managment ip address woth vlan 1 but there is no vlan . When i type command " int vlan 1" , error is appears.
01-12-2016 12:08 PM
The 1841 is a router and not a switch. It has routed ports and no vlan-interfaces (unless you insert a switch-module into one of the slots).
01-12-2016 01:40 PM
Ah OK, try this:
!
ip vrf management
description management VRF
!
!
int fa0/0
no shut
ip vrf forwarding management
ip address 192.168.2.200 255.255.255.0
!
int fastethernet0/0.10
encapsulation dot1q 10
ip address 192.168.10.254 255.255.255.0
no shut
!
You need to create a sub-interface to get IOS to tag VLAN1 on fa0/0. You can confirm this:
r3#sh int fa0/0
...
FastEthernet0/0 is up, line protocol is down
Hardware is Gt96k FE, address is 001e.4a8c.1726 (bia 001e.4a8c.1726)
Internet address is 192.168.1.254/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set
Keepalive set (10 sec)
...
If you don't want to create VLAN10, then explicitly create the VLAN1 sub-interface:
!
int fastethernet0/0.1
encapsulation dot1q 1
ip vrf forwarding management
ip address 192.168.2.200 255.255.255.0
no shut
!
r3#sh int fa0/0.1
FastEthernet0/0.1 is up, line protocol is down
Hardware is Gt96k FE, address is 001e.4a8c.1726 (bia 001e.4a8c.1726)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation 802.1Q Virtual LAN, Vlan ID 1.
cheers,
Seb.
Please rate helpful posts :)
01-12-2016 11:08 AM
Moving discussion to the Network Infrastructure>WAN,Routing community for greater visibility
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