What I want to do is build in redundancy for devices that are dual homed on these two stacked 3750s. My phone tech wants to bind voice services on the loopbacks on these two Cisco 5350 gateways. he wants it so that if a switch dies we can still route to both loopbacks. The problem starts when one switch goes down. For example when switch01 dies, I cant ping the loopback 188.8.131.52 from sw02.
Here is the routing table on router1 (left in the diagram)
Gateway of last resort is 10.1.56.1 to network 0.0.0.0 184.108.40.206/24 is subnetted, 1 subnets C 220.127.116.11 is directly connected, Loopback0 10.0.0.0/24 is subnetted, 2 subnets C 10.1.56.0 is directly connected, GigabitEthernet0/0 C 10.1.70.0 is directly connected, GigabitEthernet0/1 S* 0.0.0.0/0 [1/0] via 10.1.56.1
I put in a scond route as you can see here:
VOIPXML01-HVN#sh run | i ip route ip route 0.0.0.0 0.0.0.0 10.1.56.1 ip route 0.0.0.0 0.0.0.0 10.1.70.1 10
The .1 addresses are the SVI for the vlans on the switch.
Here is the routing table for the stacked 3750:
Gateway of last resort is 10.1.51.1 to network 0.0.0.0
18.104.22.168/32 is subnetted, 2 subnets S 22.214.171.124 [1/0] via 10.1.56.31 S 126.96.36.199 [1/0] via 10.1.56.32
S* 0.0.0.0/0 [1/0] via 10.1.51.1
And I have included other routes as well on the switch:
cab8sw1-hvn-3750g#sh run | i ip route ip route 0.0.0.0 0.0.0.0 10.1.51.1 ip route 188.8.131.52 255.255.255.255 10.1.56.31 ip route 184.108.40.206 255.255.255.255 10.1.70.31 10 ip route 220.127.116.11 255.255.255.255 10.1.70.32 ip route 18.104.22.168 255.255.255.255 10.1.56.32 10
The routers are connected to L2 interfaces on the 3750. Here is what the entry for router1 looks like:
I would not design it based on what the voice guy tell you. Since your 3750s are stacked, you can have your end devices ie servers dually attached to each 3750. So connect one NIC of the server to one 3750 and connect the other NIC of the same server to the other 3750 and use Etherchannel for load sharing. This way you have NIC redundancy and also switch redundancy. On the routers run HSRP or VRRP for gateway redundancy.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...