Hi Denha.
Check route table and gateway address of your 172.10.0.0/21 machines.
I'm sure they don't know about how to reply packets to 10.20.20.0/24
addresses.

Try it!

>
> Hi all.
>
> I recently set up a vyatta router in a network.What I'd like to do is to
> create a separate subnet to put some specific hosts (on 10.20.20.0/24).
> I connected the router to my main network (172.10.0.0/21 with a
> gateway/router on 172.10.0.5) and this is my current configuration:
>
>  protocols {
>         static {
>             disable: false
>             route 0.0.0.0/0 {
>                 next-hop: 172.10.0.5
>                 metric: 1
>             }
>         }
>     }
>     policy {
>     }
>     interfaces {
>         restore: false
>         loopback lo {
>    ;         description: ""
>         }
>         ethernet eth0 {
>             disable: false
>             discard: false
>             description: ""
>             hw-id: 00:07:e9:c7:a7:e2
>             duplex: "auto"
>             speed: "auto"
>             address 172.10.5.155 {
>                &
> nbsp;prefix-length: 21
>                 disable: false
>             }
>         }
>         ethernet eth1 {
>             disable: false
>             discard: false
>             description: ""
>             hw-id: 00:02:b3:bf:7a:23
>             duplex: "auto"
>             speed: "auto"
>             address 10.20.20.1 {
>                 prefix-length: 24
>                 disable: false
>             }
>         }
>     }
>     service {
>     }
>     firewall {
>         log-martians: "enable"
>         send-redirects: "disable"
>         receive-redirects: "disable"
>         ip-src-route: "disable"
>         broadcast-ping: "disable"
>         syn-cookies: "enable"
>     }
>     system {
>         host-name: "vyatta"
>         domain-name: ""
>         name-server 213.140.2.12
>         time-zone: "GMT"
>         ntp-server "69.59.150.135"        login {
>             user root {
>                 full-name: ""
>                 authentication {
>                     encrypted-password: ""
>                 }
>             }
>             user vyatta {
>                 full-name: ""
>                 authentication {
>                     encrypted-password: ""
>                 }
>             }
>         }
>         syslog {
>             file messages {
>                 facility "*" {
>                     level: "err"
>                 }
>             }
>         }
>         package {
>             auto-sync: 1
>             repository community {
>                 component: "main"
>                 url: "http://archive.vyatta.com/vyatta";
>             }
>         }
>     }
>
>
> I have some issues: for example from the 10.20.20.2 PC I can ping
> 172.10.0.5, but I can not reach any other pc on the 172.10.0.0.
> I'm sure I'm missing something stupid....can  you help me?
>
> Thanks,
> Clip
>
>
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