Available Bandwidth shown under the sh interface output is 384K(75% of the total bandwidth, 512 K).
Will making the Available bandwidth 512 K by using max-reserved-bandwidth affect traffic like routing updates if we are not configuring any Qos on the router?
The aim is just to get an output of "Available bandwidth 512 kilobits/sec" under show interface output.
sh int se 0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K Serial
Description: Connected to
Internet address is
MTU 1500 bytes, BW 512 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d18h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/3/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 384 kilobits/sec
"The aim is just to get an output of "Available bandwidth 512 kilobits/sec" under show interface output."
If your aim is only cosmetic, I would recommend you don't change the maximum reserved. Actual usuable bandwidth isn't lost to other classes, and even if you don't cause any issues with your current CBWFQ policies today, you could set yourself up for issues in the future.