如果没有拓扑图，如何知道备用路由器的主机名？

'''

Vlan190 - Group 0
  State is Active
    2 state changes, last state change 1w5d
  Virtual IP address is 172.16.50.254
  Active virtual MAC address is 0000.0c07.ac00 (MAC In Use)
    Local virtual MAC address is 0000.0c07.ac00 (v1 default)
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 0.704 secs
  Preemption enabled
  Active router is local
  Standby router is unknown
  Priority 110 (configured 110)
  Group name is "hsrp-Vl190-0" (default)

'''