I wanted to ask where the default-gateway for the data, voice and video vlans lives? Is it on the access 3560 switches or at the core 3750 switch?
The reason I asked is if the default-gateway for the data, voice and video vlans live on the 3750 switch you could have an 'event' that could swamp the 3750 switch CPU and/or other resources which would affect every other switch (therefore the users). Example is a user hooks up an inexpensive gigabit mini-switch in their cubicle, then proceeds to loop the cable on the mini-switch. That simple loop can send enough traffic to swamp a typical core switch CPU.
Just curious and I'll say this outloud to the community, "With the all the vlan default-gateways on the core then I suggest a single point of failure has been built".
Ok, I'll wait to hear back from you on where your vlan default-gateways are (and from everyone else that may want to pummel me for saying the 'single point of failure' statement'...;-)
My apologies for repeated questions as the failure in communication is most likely on my end.
For example, you create a 'vlan 10' (Data) at layer 2, then you create the SVI or Vlan interface with "interface vlan 10" and then you use "ip address 10.10.10.1 255.255.255.0" for the interface vlan 10.
Where does the L3 or IP addressed "interface vlan 10" live? On the 3750 or the 3560's?
Thanks Wesley, Now my early morning (I'm on west coast) brain understands..:-) I would just humbly suggest that on the 3560 (Access) that you use (if not on by default, then enable) some of the built in features to prevent a network event in one 3560 from sending so much traffic up to the 3750 as to swamp the CPU. The users I have keep finding ways to be creative in this aspect. We've see both 3750's, 4500 (SupV's) and a VSS pair get very busy with some traffic from some user created activity. Mini-switches, even those that have STP/RSTP, have been an issue for my network at various time.
Thanks for being patient with all my questions!
If I understood, you need a default route or static route from 3750 Core Switch pointing out (ISP), and the trunk link between 3750
3560 Switch being access only, you just need Management vlan and default gateway.
int vlan 10 data
int vlan 20 voice
int vlan 30 video
int vlan 50 Management
ip route 0.0.0.0 0.0.0.0 (next hop)(ISP)
switchport trunk encapsulation dot1q
switchport mode trunk
vlan 50 Management
int vlan 50
ip default-gateway 192.168.50.1
Hope that will help.
I hope you will understand the difference between Default route and Static route. There is no need to configure Default route on the Access switches (if no routing) but Some times we required. Why? I am setting in a VLAN 10 and wants to access the switch then What I will do? Switch will not respond and I have to move in the same switch management VLAN or VLAN which is having IP address on the switch or assign multiple static route on the switch. This is totally time consume process for me.
What if you want to upgrade your switch using the TFTP server or wants logs on the another server which is not in the same management VLAN?
We have consider all points.