[j-nsp] QFX5100 firewall family ethernet-switching rules

Panny Malialis panny at hotlinks.uk
Tue May 16 16:46:23 EDT 2017


Hi all,


I am trying to configure an input filter on a LACP bundle interface but 
it does not behave as expected.

Take the following examples:

firewall {
     family ethernet-switching {
         filter acl1 {
             term a {
                 from {
                     ip-protocol icmp;
                 }
                 then accept;
             }
             term b {
                 from {
                     ip-source-address {
                         1.2.3.4/32;
                     }
                 }
                 then accept;
             }
             term c {
                 from {
                     ip-protocol [ tcp udp ];
                 }
                 then discard;
             }
         }
         filter acl2 {
             term a {
                 from {
                     ip-source-address {
                         1.2.3.4/32;
                     }
                 }
                 then discard;
             }
             term b {
                 then accept;
             }
         }
     }
}


When I apply acl1, it seems to kill all traffic on the interface and 
does not allow anything through.

When I apply acl2, it does do what you would expect.

The switch is acting simply as a layer 2 device and the input filter is 
being applied on the LAG bundle connected to the upstream.

Also, if I don't specify [tcp udp] on acl1 it actually kills the LAG 
towards the upstream completely, weird!

Can anyone please shed any light on what I may be doing wrong?

Thanks in advance,

Panny Malialis



More information about the juniper-nsp mailing list