VNXeのネットワーク正常性確認方法について

下記KBのこの部分を参照して一応connectivityをチェックしています。
https://support.emc.com/kb/468465
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1. Verify and confirm if the DNS server IP addresses entered under Management
Connections (Settings > Management Settings) are valid ones.
2. Password on support website expire periodically and will be prompted to change.
Once changed on the support site, it should be updated on the Unisphere manually.
Try applying the password again on the support credentials section.
3. Run SSH to the VNXe and try to ping all the DNS servers and the default gateway.
4. Perform nslookup uemconnect.emc.com from the primary storage processor (SP) and see if the IP can be resolved.
5. If you cannot resolve the IP via nslookup, try changing the DNS IP positions under DNS servers tab from VNXe "Management settings" tab.
6. Verify in your network if ports 80 and 443 is allowed outwards and to uemconnect.emc.com.
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https://support.emc.com/docu52697_Secure-Remote-Support-for-VNXe-Requirements-and-Configuration.pdf?language=en_US
のページ２に記載しているネットワークの要件は下記の項目だけです。
At least one DNS server must be configured on your VNXe. Unrestricted access to *.emc.com over the Internet using HTTPS (for non-proxy environments).