Ubuntu 22.04双网卡Netplan路由配置问题咨询

我有一台新的Ubuntu服务器，配备了两块网卡，我为它编写了如下Netplan配置：

network:
  version: 2
  renderer: networkd
  ethernets:
    ens160:
      dhcp4: no
      addresses:
        - 192.168.1.2/24
      routing-policy:
        - from: 192.168.1.0/24
          table: 160
      routes:
        - to:  0.0.0.0/0
          via: 192.168.1.1
        - to: 172.10.10.10
          via: 192.168.1.1
          on-link: true
          metric: 100
          table: 160
      nameservers:
        addresses:
          - 8.8.8.8
          - 4.2.2.4
      accept-ra: no
    ens192:
      dhcp4: no
      addresses:
        - 172.31.99.2/24
      routing-policy:
        - from: 172.31.99.0/24
          table: 192
      routes:
        # - to:  0.0.0.0/0
        #  via: 172.31.99.1
        - to:  172.22.22.22
          via: 172.31.99.1
          on-link: true
          metric: 100
          table: 192
      accept-ra: no

我遇到了两个问题，想请教大家：

问题1：启用ens192默认网关时出现冲突警告 #

当我取消注释ens192的默认网关配置后，会收到以下警告信息：

** (generate:2260): WARNING **: 20:34:27.603: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in ens192 but also in ens160

** (process:2258): WARNING **: 20:34:28.411: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in ens192 but also in ens160

** (process:2258): WARNING **: 20:34:28.427: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in ens192 but also in ens160

** (process:2258): WARNING **: 20:34:28.970: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in ens192 but also in ens160

** (process:2258): WARNING **: 20:34:28.971: Problem encountered while validating default route consistency.Please set up multiple routing tables and use `routing-policy` instead.
Error: Conflicting default route declarations for IPv4 (table: main, metric: default), first declared in ens192 but also in ens160

请问为什么会出现这个问题？

问题2：无法通过指定路由表的目标地址进行ping测试 #

当我尝试ping路由表160或192中的目标地址时，没有数据包能够传输成功：

ping 172.20.20.20
4 packets transmitted, 0 received, 100% packet loss

ping 172.20.20.20 -I ens192
4 packets transmitted, 0 received, 100% packet loss

请问这个问题的解决方案是什么？

感谢大家的关注和解答！

备注：内容来源于stack exchange，提问作者pumper