07-25-2007 11:11 AM - edited 03-05-2019 05:29 PM
I'm trying to add new VLANs to my Cisco 3750, but am having problems. I can add the vlan int and associate an IP with it, but I cannot ping the vlan interface, nor does it show up as a connected route when I do a show ip route. Here's the info below:
Building configuration...
Current configuration : 5515 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Switch
!
enable secret
!
no aaa new-model
switch 1 provision ws-c3750-48ts
ip subnet-zero
ip routing
ip dhcp excluded-address 192.168.2.1 192.168.2.50
ip dhcp excluded-address 192.168.2.101 192.168.2.254
!
ip dhcp pool VLAN2
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
!
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface Loopback1
ip address 192.168.253.2 255.255.255.255
!
interface FastEthernet1/0/1
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/2
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/3
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/4
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/5
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/6
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/7
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/8
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/9
switchport access vlan 2
spanning-tree portfast
!
interface FastEthernet1/0/10
switchport access vlan 2
spanning-tree portfast
!
interface Vlan1
no ip address
!
interface Vlan2
ip address 192.168.2.1 255.255.255.0
!
interface Vlan3
ip address 10.57.200.1 255.255.255.0
!
interface Vlan4
ip address 10.56.2.1 255.255.255.0
!
interface Vlan5
ip address 10.56.12.1 255.255.255.0
!
interface Vlan6
ip address 10.56.22.1 255.255.255.0
!
router eigrp 100
network 192.168.2.0
network 192.168.253.2 0.0.0.0
network 192.168.254.0
auto-summary
!
ip classless
ip http server
ip http secure-server
!
!
!
control-plane
!
!
line con 0
line vty 0 4
password xxx
login
line vty 5 15
password xxx
login
!
end
Switch#ping 10.57.200.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.57.200.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Switch#
Switch#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.254.0/24 is directly connected, FastEthernet1/0/46
D 192.168.1.0/24 [90/28416] via 192.168.254.2, 00:04:11, FastEthernet1/0/46
192.168.253.0/24 is variably subnetted, 2 subnets, 2 masks
D 192.168.253.0/24 is a summary, 00:04:11, Null0
C 192.168.253.2/32 is directly connected, Loopback1
C 192.168.2.0/24 is directly connected, Vlan2
Switch#
07-25-2007 11:15 AM
The route would only show up if the VLAN 3 interface is up. You need to have atleast one active port on vlan 3 or a trunk port in which 3 VLAN is active for the interface to come up. Can you assign one of the active ports to vlan 3 and check the status?
HTH
Sundar
07-25-2007 11:31 AM
That worked for vlan3 int. I've got another Netgear smart switch that needs to see these vlans as well. I've got fa1/0/47 set up like this:
interface FastEthernet1/0/47
switchport mode dynamic desirable
Will that serve as an appropriate trunk to allow the vlans be seen across both switches? Essentially a trunking interface...
Thanks,
Steve
07-25-2007 11:33 AM
Try this configuration.
int f1/0/47
switchport trunk encapsulation dot1q
switchport mode trunk
HTH
Sundar
07-25-2007 11:47 AM
The Netgear switch has an IP of 192.168.2.3 which is on Vlan2. After setting the trunk encaps. and the mode, I cannot ping the netgear switch.
07-25-2007 11:52 AM
Did you create vlan 2 itself and not the vlan interface in the Netgear?
07-25-2007 12:16 PM
That was it...I had not created the trunking port on the netgear switch. I can ping it now. Thanks for your help!
07-25-2007 02:08 PM
stephen,
perform a 'show interface' command. My guess is the vlans you have created are down, since there is no port(s) assigned to the new vlan(s).
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