I have been looking into this for a while and I can't seem to figure out why my 2nd vlan is not able to connect properly to the net. I would be grateful if someone could take a look and advise on what Im doing wrong.
My switch has 12 ports where my devices connects directly, they are all on Vlan 1 and they all work perfectly.
on Port 12 I have a dlink router that is connected to a cable modem. the dlink router has an Ip address of 192.168.0.20
I created a second vlan (vlan2) and enabled dhcp relay on it. then I assigned port 9 on the switch to (vlan2)
my laptop which is connected to port 9 seems to get an ip address fine and able to ping only some devices on my network (vlan1) and is not able to go out to the internet. I think it has to do with the routes
vlan 1 is giving this default route : 0.0.0.0 0.0.0.0 192.168.0.20 192.168.0.52 10
vlan 2 is giving this one : 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.51 10
why is my default routes look different for the 2 Vlans (the underlined) ? any idea on why vlan1 works and not vlan2 ?
here is my switch's config :
!
! Last configuration change at 00:25:58 UTC Mon Dec 19 2011
! NVRAM config last updated at 00:19:57 UTC Mon Dec 19 2011
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S3750
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$kGRQ$mNfjtNRp6moUunJOlRPX71
!
!
!
no aaa new-model
clock timezone UTC -5
switch 1 provision ws-c3750g-12s
system mtu routing 1500
ip routing
!
!
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/2
!
interface GigabitEthernet1/0/3
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
switchport access vlan 2
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface Vlan1
ip address 192.168.0.1 255.255.255.0
!
interface Vlan2
ip address 192.168.1.1 255.255.255.0
ip helper-address 192.168.0.3
!
ip default-gateway 192.168.0.20
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.20
ip http server
ip http secure-server
!
!
ip sla enable reaction-alerts
!
snmp-server community public RO
snmp-server community private RW
snmp-server location Home
!
!
line con 0
password cisco
login
line vty 0 4
password cisco
login
line vty 5 15
login
!
end
Here is the routing table on Computer 1 ( on Vlan 1) :
===========================================================================
Interface List
12...1c 6f 65 c1 a3 d3 ......Realtek PCIe GBE Family Controller #2
11...1c 6f 65 c1 3c 72 ......Realtek PCIe GBE Family Controller
1...........................Software Loopback Interface 1
15...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
14...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.0.20 192.168.0.52 10
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
192.168.0.0 255.255.255.0 On-link 192.168.0.52 266
192.168.0.52 255.255.255.255 On-link 192.168.0.52 266
192.168.0.255 255.255.255.255 On-link 192.168.0.52 266
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 192.168.0.52 266
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 192.168.0.52 266
===========================================================================
Persistent Routes:
None
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
11 266 fe80::/64 On-link
11 266 fe80::e98d:c724:7ef5:244a/128
On-link
1 306 ff00::/8 On-link
11 266 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
and here is the routes on the computer that is on Vlan 2
===========================================================================
Interface List
15...f0 de f1 47 be 71 ......Intel(R) 82577LM Gigabit Network Connection
14...00 27 10 49 c8 b8 ......Intel(R) Centrino(R) Advanced-N 6200 AGN
1...........................Software Loopback Interface 1
13...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
27...00 00 00 00 00 00 00 e0 Microsoft Teredo Tunneling Adapter
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.51 10
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
192.168.1.0 255.255.255.0 On-link 192.168.1.51 266
192.168.1.51 255.255.255.255 On-link 192.168.1.51 266
192.168.1.255 255.255.255.255 On-link 192.168.1.51 266
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 192.168.1.51 266
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 192.168.1.51 266
===========================================================================
Persistent Routes:
None
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
1 306 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
thank you for your time
