i have a Cisco SX20 , how can i get the SN.

Dear All,    I have two Nexus 5672UP and two Nexus 2224TF Switch.。Two N2K as the extension to N5K.。VPC is configured on N5K。But  when i config VRRP on N5K，the both N5K act as Master。How do i fix it？The two switch configuration is as follows。Switch1：I...

I have two cisco ASA5512-K9 firewall with 250 SSL VPN license . i bought two cisco ASA 5512-x security plus license for HA . did i also need to buy 250 SSL VPN license ?or i can directly install the ASA 5512-x security plus license , and then the fir...