DennisKonrad commented on issue #3179: Redundant VRouter guest network on wrong interface URL: https://github.com/apache/cloudstack/issues/3179#issuecomment-553940664 @weizhouapache I found that the json the router receives really does not have the "nic_dev_id" set at all. Therefor the script fails because the value has "null" asigned then. **redundant VPC** `{"ip_address":[ {"public_ip":"172.20.20.12","source_nat":true,"add":true,"one_to_one_nat":false,"first_i_p":true,"gateway":"172.20.0.1","netmask":"255.255.0.0","vif_mac_address":"1e:00:d5:00:00:c2","new_nic":false,"nw_type":"Public"}],"type":"ips"} **non redundant VPC** {"ip_address":[ {"public_ip":"172.20.20.13","source_nat":true,"add":true,"one_to_one_nat":false,"first_i_p":true,"gateway":"172.20.0.1","netmask":"255.255.0.0","vif_mac_address":"1e:00:f4:00:00:c3",**"nic_dev_id":1**,"new_nic":false,"nw_type":"Public"}],"type":"ips"}`
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