Static Routes and Load Balancing

[J001]

Hello,

I have the following configuration on one of the 3750 access switches. The switch is in a stacked configuration and each stack has a link to either core 6509 switch.

Odd metric number point to core1 and even to core2.

Is this performing load balancing or is it fault tolerance only ?

ip route 0.0.0.0 0.0.0.0 10.131.248.17
ip route 0.0.0.0 0.0.0.0 10.131.248.21
ip route 10.131.0.0 255.255.0.0 10.131.248.17 10
ip route 10.131.0.0 255.255.0.0 10.131.248.21 20
ip route 10.132.0.0 255.255.0.0 10.131.248.21 10
ip route 10.132.0.0 255.255.0.0 10.131.248.17 20
ip route 10.133.0.0 255.255.0.0 10.131.248.17 10
ip route 10.133.0.0 255.255.0.0 10.131.248.21 20
ip route 10.134.0.0 255.255.0.0 10.131.248.21 10
ip route 10.134.0.0 255.255.0.0 10.131.248.17 20

 

[burtsbees]

Fault tolerance only. Use HSRP/VRRP for load alancing and fault tolerance (GLBP/VRRP, but HSRP can be configured to do both).

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[VinceWhirlwind]

Even better, upgrade your Sups in the 6500s and enable VSS, then you can improve your edge switches to Layer2-only with etherchannels back to the core spread over the two 6500s - load balancing/redundancy and a MASSIVE improvement in convergence time.

 

[J001]

Thank you for the feedbacks.

1) We are currently using WS-SUP720-3B sups. How much of an upgrade do we need to make to use the VSS mode ? I guess its a costly one ?

 

[VinceWhirlwind]

You need a Sup that supports Policy Feature Card 3C (PFC3C) or Policy Feature Card 3CXL (PFC3CXL) mode which is the 720-10G VSS (VS-S720-10G-3C/XL).

All the opther modules in the two 6500s need to be WS-X6700 series. These modules can also support either a centralized forwarding card (CFC) or a DFC. If a DFC is installed, it must either be DFC3C or DFC3CXL