ratotopii wrote:
Right now I am using one router to connect all the different private IP networks in my company but now I want to use two layer 3 switches like CIsco ME 3400 for my network for redundancy Is it possible ?? I have different private network like 10.10.11.0/24 . 10.10.12.0/24 and 10.10.13.0/24 IP connected throught router but can I use two layer 3 switches and connect this same private IP network with one another for redundancy. Please suggest what will be the best solution .Thank you for your help.
Yes it's possible. You would connect the 2 switches together with a L2 trunk and then on each switch create your vlans then use HSRP for redundancy eg.
using 10.10.13.0/24 as an example
ME1
switch(config)# vlan 10
switch(config)# int vlan 10
switch(config-if)# ip address 10.10.13.2 255.255.255.0
switch(config-if)# standby 10 ip 10.10.13.1
switch(config-if)# standby 10 priority 110
switch(config-if)# standby 10 preempt
switch(config-if)# standby 10 authentication
ME2
switch(config)# vlan 10
switch(config)# int vlan 10
switch(config-if)# ip address 10.10.13.3 255.255.255.0
switch(config-if)# standby 10 ip 10.10.13.1
switch(config-if)# standby 10 authentication
All clients in vlan 10 should use 10.10.13.1 as their default-gateway. In the above example ME1 is the HSRP active. You can make ME1 HSRP active for all vlans or you can make ME2 active for some so you get a rudimentary load-balancing.
Don't forget the switches need connecting together with a L2 trunk allowing all your vlans on it.
One last point - why ME3400 switches ? These are very specific service provider access switches. If you just want a general L3 switch i would go with the 3560 or the 3750.
Jon
