As Reza rightly pointed out, you cannot stack 3560 switches doesnt support ciscos stackwise technology that 3750's support ! You need to do the following to maintain redundancy on the 3560 switches:
1) Use etherchannels to between the switches, and bundle more than one gig ports (to increase capacity and redundancy)...
2) Configure L2 trunk on the etherchannel connectivity between switches, to span the vlans between the 3560 switches
3) Configure Layer 3 SVIs for the VLANs between the switches, and have HSRP/VRRP configured between the L3 SVI's.. eg.. VLAN 100 on switch 1 - 192.168.1.1 , VLAN 100 on switch 2 - 192.168.1.2 , HSRP VIP - 192.168.1.3... configure pre-empt etc on hsrp..
4) Configure the edge switches (if any) with L2 trunks to these 3560 switches
5) Configure the default gateways for the VLANs (say VLAN 100 taken before) to the HSRP VIP between the switches (192.168.1.3)
Standardize your configurations on switches, and use best practice Layer 2/Layer 3 parameters to have best results.. for eg, you can enable bpdu guard, portfast, root guard, RSTP etc on these switches for reliable use of resources..
HSRP is good, but will only ever use one switch at a time unless you set-up 2 groups. HSRP is typically used for fail over set-up. As indicated already, setting up etherchannels is a great practice since this will bind the 2 together. Another resource to look at is GLBP, Gateway Load Balancing Protocol. This will allow both switches to be used and share the load.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.