网络工程 - 从另一个网络 ping 电脑时“目标主机无法访问” - 吾爱随笔录

我尝试在 Packet Tracer 中构建一个简单的网络，当我尝试从另一个网络 ping 一台 PC 时，我得到“目标主机无法访问”。来自同一网络的 Ping PC 工作正常。当我从另一个网络对 PC 使用 tracert 时，它会在当前网络默认网关处停止。我的猜测是它与两个路由器之间的连接有关，但我不知道究竟是什么。如果有人可以帮助我解决这个问题，我将不胜感激。先感谢您。这是网络的图像。

路由器 0 配置：

 ROOM1#show running-config 
    Building configuration...
    
    Current configuration : 799 bytes
    !
    version 15.1
    no service timestamps log datetime msec
    no service timestamps debug datetime msec
    no service password-encryption
!
hostname ROOM1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX1524U1YC-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 192.168.0.1 255.255.255.240
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 192.168.0.253 255.255.255.252
 tx-ring-limit 10000
 clock rate 128000
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

路由器 1 配置：

ROOM2#show running-config 
Building configuration...

Current configuration : 781 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname ROOM2
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX152462Z7-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 ip address 192.168.0.17 255.255.255.240
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Serial0/0/0
 ip address 192.168.0.254 255.255.255.252
 tx-ring-limit 10000
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end