Whhich bandwidth are you concerned about - outgoing or incoming? If you do not have control over Service Provider's router, you can't achieve true QoS(when you can make sure certain kinds of traffic get more priority than others) for incoming traffic. What you can do though, is to limit certain traffic on your router, ensuring that the remaining portion is available to the target network. For example, you can limit traffic(or certain kinds of traffic, like streaming videos) on LAN2 and LAN3 interfaces which will guarantee that LAN1 always has 3mbits available.
In Cisco terminology this is called traffic policing(as opposed to shaping for true QoS) This document is a good start :
http://www.ict-partner.net/en/US/docs/ios/12_2/qos/configuration/guide/qcfpolsh.html#wpxref40342
I would choose a consistent approach across the entire environment. Both solutions work fine and will remain compatible with most applications. There is a difference in manageability, though.
I go with the short name as the HOSTNAME setting, and set the FQDN as the first column in /etc/hosts for the server's IP, followed by the short name.
I have not encountered many software packages that enforce or display a preference between the two. I find the short name to be cleaner for some applications, specifically logging. Maybe I've been unlucky in seeing internal domains like server.northside.chicago.rizzomanufacturing.com. Who wants to see that in the logs or a shell prompt?
Sometimes, I'm involved in company acquisitions or restructuring where internal domains and/or subdomains change. I like using the short hostname in these cases because logging, kickstarts, printing, systems monitoring, etc. do not need full reconfiguration to account for the new domain names.
A typical RHEL/CentOS server setup for a server named "rizzo" with internal domain "ifp.com", would look like:
/etc/sysconfig/network:
HOSTNAME=rizzo
...
-
/etc/hosts:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.16.100.13 rizzo.ifp.com rizzo
-
[root@rizzo ~]# hostname
rizzo
-
/var/log/messages snippet:
Dec 15 10:10:13 rizzo proftpd[19675]: 172.16.100.13 (::ffff:206.15.236.182[::ffff:206.15.236.182]) - Preparing to
chroot to directory '/app/upload/GREEK'
Dec 15 10:10:51 rizzo proftpd[20660]: 172.16.100.13 (::ffff:12.28.170.2[::ffff:12.28.170.2]) - FTP session opened.
Dec 15 10:10:51 rizzo proftpd[20660]: 172.16.100.13 (::ffff:12.28.170.2[::ffff:12.28.170.2]) - Preparing to chroot
to directory '/app/upload/ftp/SRRID'
Best Answer
From @akostadinov's answer:
"One can create multiple SSIDs in the router. Then assign a different QoS value for each SSID."
The SSID here means that you'll have the QoS set based on the SSID priority value.
https://fccid.io/Q78-ZXW3512C/User-Manual/User-Manual-1928235
And according to the manual, it's simply that higher number will have higher priority, not 0-1 for background and etc.
"SSID Name
Set a name for this SSID. A name is composed of 1–32 characters.
Priority
Set the SSID priority ranging from 0 to 7. The default value is 0, indicating no priority is set. A greater value indicates a higher priority."