I have three Cisco SG300-28 switches. I setup a test lab environment with a core (server) switch in Layer 3 mode and the rest are (clients) in Layer 2 mode. As I understand, these switches doesn't support VTP, only GVRP. And GVRP works the same with VTP. Whenever you create VLANs on the core or main switch, other switches will learn from the core switch and no VLAN creation for the client switches will be made. (Hope I got it right. I guess GVRP is more complicated than VTP).
GOAL: Obviously, I want to use GVRP to create VLANs on the main switch so that I won't be doing it all over on the other switches.
The following is my (so far) configuration through CLI only:
I haven't use the web GUI. My SW version is 1.1.2.0.
1. I already enabled the GVRP globally.
2. I configured GE 12 & GE 24 as TRUNK ports for the core switch that connects both switches, I also configured GE 12 ports for both the client switches. All other ports are in ACCESS mode. (I am connected to GE 2 port)
3. I enabled GVRP on the TRUNK ports only for all switches.
4. I allowed all vlans on the TRUNK ports. (#switchport trunk allowed vlan add all)
5. All TRUNK ports registration mode is NORMAL and dynamic vlan creation is enabled on all trunk and access ports.
6. I created 3 VLANs without configuring its IP Addresses:
vlan 2 = MGT
vlan 3 = IT
vlan 4 = MKTG
I don't know if I missed something on the configuration or the connection. I was expecting the vlans I created will be learned from other switches. Hope somebody can help me out. Thanks a lot.
QUESTIONS:
1. Is it necessary to enable all switches to layer 3 mode? Or depends on the network setup? Does this affect the GVRP?
2. Does switching ports to TRUNK mode means they are already 802.1q ports by default? Because I can't configure TRUNK ports to 802.1q (#switchport encapsulation dot1q) config like other switches.
SAMPLE CONFIGURATION:
*** START CONFIG***
vlan database
vlan 2-4
exit
interface range gi12,gi24
gvrp enable
exit
gvrp enable
interface vlan 1
ip address 172.10.10.10 255.255.255.0
exit
interface vlan 1
no ip address dhcp
exit
no bonjour enable
bonjour interface range vlan 1
hostname SW1
line telnet
exec-timeout 0
exit
line telnet
password 1e3855b6b22c5775cd12207ced02a082b073e4a8 encrypted
exit
line console
password 1e3855b6b22c5775cd12207ced02a082b073e4a8 encrypted
exit
enable password level 15 encrypted 1e3855b6b22c5775cd12207ced02a082b073e4a8
no snmp-server server
clock source sntp
no ip domain lookup
ip telnet server
banner login ^C
********************************
SWITCH 1: PLEASE DO NOT LOG IN
********************************
^C
interface gigabitethernet1
switchport mode access
exit
interface gigabitethernet2
switchport mode access
exit
...
interface gigabitethernet11
switchport mode access
exit
interface gigabitethernet12
switchport trunk allowed vlan add 2-4
exit
interface gigabitethernet13
switchport mode access
exit
interface gigabitethernet14
switchport mode access
exit
...
interface vlan 2
name MGT
exit
interface vlan 3
name IT
exit
interface vlan 4
name MKTG
exit
*** END CONFIG ***
