Szybkie pytanie odnosnie bandwidth remaining percent command. Ponizej moj konfig na interfejsie.
Kod: Zaznacz cały
Rack1R4#show int se0/0/1
Serial0/0/1 is up, line protocol is up
Hardware is GT96K Serial
Internet address is 155.1.45.4/24
MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:08, output 00:00:02, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 10
Queueing strategy: Class-based queueing
Output queue: 0/512/0 (size/max total/drops)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 0 packets/sec
24587 packets input, 1488918 bytes, 0 no buffer
Received 1254 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
14476 packets output, 7270010 bytes, 0 underruns
0 output errors, 0 collisions, 7 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Rack1R4#sh run int se0/0/1
Building configuration...
Current configuration : 146 bytes
!
interface Serial0/0/1
ip address 155.1.45.4 255.255.255.0
ip rip advertise 10
service-policy output R4_TO_R5_POLICY
hold-queue 512 out
end
Rack1R4#sh run | sec policy|class
class-map match-all C_HTTP
match access-group name HTTP
class-map match-all C_ICMP
match protocol icmp
match packet length min 1001
class-map match-all C_VOICE
match ip rtp 16384 16383
match packet length max 60
match packet length min 60 max 60
class-map match-all PRECEDENCE_0
match ip precedence 0
match input-interface FastEthernet0/1
policy-map R4_TO_R5_POLICY
class C_HTTP
set ip precedence 2
bandwidth remaining percent 33
class C_ICMP
drop
class C_VOICE
set dscp ef
priority 27
class PRECEDENCE_0
set ip precedence 1
bandwidth remaining percent 33
class class-default
queue-limit 32 packets
fair-queue
service-policy output R4_TO_R5_POLICY
(1544*0.75)-27(dla classy C_VOICE gdzie priority ustawione jest na 27)=1131
nastepnie 1131*0.33=373.23
jesli dobrze wyliczylem to 373 powinno byc dostepnym passmem dla class, w ktorych uzylem bandwidth remaining percent 33
Natomiast kiedy zrobie show policy-map int se0/0/1 widze wieksza wartos 500
Kod: Zaznacz cały
Rack1R4#show policy-map int se0/0/1
Serial0/0/1
Service-policy output: R4_TO_R5_POLICY
queue stats for all priority classes:
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 0/0
Class-map: C_HTTP (match-all)
11127 packets, 6444084 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: access-group name HTTP
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 0/0
QoS Set
precedence 2
Packets marked 11127
bandwidth remaining 33% (500 kbps)
Class-map: C_ICMP (match-all)
18 packets, 20472 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: protocol icmp
Match: packet length min 1001
drop
Class-map: C_VOICE (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip rtp 16384 16383
Match: packet length max 60
Match: packet length min 60 max 60
QoS Set
dscp ef
Packets marked 0
Priority: 27 kbps, burst bytes 1500, b/w exceed drops: 0
Class-map: PRECEDENCE_0 (match-all)
19 packets, 14576 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip precedence 0
Match: input-interface FastEthernet0/1
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/0/0
(pkts output/bytes output) 0/0
QoS Set
precedence 1
Packets marked 19
bandwidth remaining 33% (500 kbps)
Class-map: class-default (match-any)
1514 packets, 389578 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Queueing
queue limit 32 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/0/0/0
(pkts output/bytes output) 1248/333379
Fair-queue: per-flow queue limit 8
Wartos pokazana przez IOS byla by poprawna w przypadku kiedy uzylbym max-reserved-bandwidth 100, ale tego nie zrobilem i by defaul jest to 75%.
Pozdrawiam
Marcin
