=> show device
Router R1 is running
  Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
  Router's hypervisor runs on localhost:7200, console is on port 2000
  Image is ios/c3640-js.bin with idle-pc value of 0x605d93d4
  Idle-max value is 1500, idlesleep is 30 ms
  128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
   slot 1 hardware is NM-4T with 4 interfaces
      Serial1/0 is connected to router R2 Serial1/0
      Serial1/1 is connected to router R5 Serial1/0
      Serial1/2 is empty
      Serial1/3 is empty

Router R2 is running
  Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
  Router's hypervisor runs on localhost:7200, console is on port 2001
  Image is ios/c3640-js.bin with idle-pc value of 0x605d93d4
  Idle-max value is 1500, idlesleep is 30 ms
  128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
   slot 0 hardware is NM-4E with 4 interfaces
      Ethernet0/0 is connected to router R3 Ethernet0/0
      Ethernet0/1 is connected to router R5 Ethernet0/1
      Ethernet0/2 is empty
      Ethernet0/3 is empty
   slot 1 hardware is NM-4T with 4 interfaces
      Serial1/0 is connected to router R1 Serial1/0
      Serial1/1 is empty
      Serial1/2 is empty
      Serial1/3 is empty

Router R3 is running
  Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
  Router's hypervisor runs on localhost:7200, console is on port 2002
  Image is ios/c3640-js.bin with idle-pc value of 0x605d93d4
  Idle-max value is 1500, idlesleep is 30 ms
  128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
   slot 0 hardware is NM-4E with 4 interfaces
      Ethernet0/0 is connected to router R2 Ethernet0/0
      Ethernet0/1 is empty
      Ethernet0/2 is empty
      Ethernet0/3 is empty
   slot 1 hardware is NM-4T with 4 interfaces
      Serial1/0 is empty
      Serial1/1 is connected to router R4 Serial1/1
      Serial1/2 is empty
      Serial1/3 is empty

Router R4 is running
  Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
  Router's hypervisor runs on localhost:7200, console is on port 2003
  Image is ios/c3640-js.bin with idle-pc value of 0x605d93d4
  Idle-max value is 1500, idlesleep is 30 ms
  128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
   slot 0 hardware is NM-4E with 4 interfaces
      Ethernet0/0 is connected to router R5 Ethernet0/0
      Ethernet0/1 is empty
      Ethernet0/2 is empty
      Ethernet0/3 is empty
   slot 1 hardware is NM-4T with 4 interfaces
      Serial1/0 is empty
      Serial1/1 is connected to router R3 Serial1/1
      Serial1/2 is empty
      Serial1/3 is empty

Router R5 is running
  Hardware is dynamips emulated Cisco 3640 with 96 MB RAM
  Router's hypervisor runs on localhost:7200, console is on port 2004
  Image is ios/c3640-js.bin with idle-pc value of 0x605d93d4
  Idle-max value is 1500, idlesleep is 30 ms
  128 KB NVRAM, 0 MB disk0 size, 0 MB disk1 size
   slot 0 hardware is NM-4E with 4 interfaces
      Ethernet0/0 is connected to router R4 Ethernet0/0
      Ethernet0/1 is connected to router R2 Ethernet0/1
      Ethernet0/2 is empty
      Ethernet0/3 is empty
   slot 1 hardware is NM-4T with 4 interfaces
      Serial1/0 is connected to router R1 Serial1/1
      Serial1/1 is empty
      Serial1/2 is empty
      Serial1/3 is empty