[j-nsp] enable "ip-source-guard" in one specific interface in a VLAN

Chen Jiang ilovebgp4 at gmail.com
Wed Jul 7 10:45:54 EDT 2021


Hi! Experts

We want to  Could we do it?  In old Non-ELS switches only interfaces
configured this knob apply the security check, but when migrate to new ELS
switches we found the behaviour is changed.

ELS switches configuration:
lab# show vlans
vlan100 {
           vlan-id 100;
           l3-interface irb.100;
           forwarding-options {
                      dhcp-security {
                              ip-source-guard;
                               group test {
                                          interface ge-0/0/6.0 {
                                                     static-ip
192.168.100.100 mac 84:b5:9c:ce:b9:4d;
                                          }
                               }
                    }
}

In above configuration we found other interfaces discard all traffic due to
traffic not hit entry  in the white list, we think because they are all in
untrusted role because "ip-source-guard" is configured in this VLAN. how
could we put other interfaces in trusted role or disable "ip-source-guard"
in other interfaces? Thanks for your support.


-- 
BR!



           James Chen


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