The max-reserved-bandwidth command is not supported in Cisco IOS Release 12.2SR or in 12.2SX. It is supported in 12.4T, but only up to the 12.4(20)T release in which HQF functionality was integrated.
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_m1.html#wp1054626
This investigation by Pavel Bykov explains it all.
!!! R4 interface Multilink1 bandwidth 128 ip address 155.13.45.4 255.255.255.0 ip rip advertise 10 fair-queue ppp multilink ppp multilink interleave ppp multilink group 1 ppp multilink fragment delay 10 end interface Serial0/1/0 bandwidth 128 no ip address encapsulation ppp ip tcp header-compression load-interval 30 no fair-queue clock rate 128000 ppp multilink ppp multilink group 1 end !!! R5 interface Multilink1 ip address 155.13.45.5 255.255.255.0 ip rip advertise 10 fair-queue ppp multilink ppp multilink interleave ppp multilink group 1 ppp multilink fragment delay 10 end interface Serial0/1/0 bandwidth 128 no ip address encapsulation ppp no fair-queue ppp multilink ppp multilink group 1 end
Verification
!!! R4
R4#sh ppp multilink
Multilink1
Bundle name: R5
Remote Endpoint Discriminator: [1] R5
Local Endpoint Discriminator: [1] R4
Bundle up for 00:15:12, total bandwidth 128, load 33/255
Receive buffer limit 12000 bytes, frag timeout 1000 ms
Interleaving enabled
0/0 fragments/bytes in reassembly list
0 lost fragments, 0 reordered
0/0 discarded fragments/bytes, 0 lost received
0x5DE9 received sequence, 0x8244 sent sequence
Member links: 1 active, 0 inactive (max not set, min not set)
Se0/1/0, since 00:15:12, 160 weight, 152 frag size
No inactive multilink interfaces
R4#sh int s0/1/0
Serial0/1/0 is up, line protocol is up
Hardware is GT96K Serial
MTU 1500 bytes, BW 128 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 13/255, rxload 11/255
Encapsulation PPP, LCP Open, multilink Open
Link is a member of Multilink bundle Multilink1, loopback not set
Keepalive set (10 sec)
CRC checking enabled
Last input 00:00:09, output 00:00:04, output hang never
Last clearing of "show interface" counters 01:37:19
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 6000 bits/sec, 11 packets/sec
30 second output rate 7000 bits/sec, 11 packets/sec
74352 packets input, 5015177 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
85309 packets output, 7605592 bytes, 0 underruns
0 output errors, 0 collisions, 9 interface resets
1 unknown protocol drops
1 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
19 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
R4#sh int multilink 1
Multilink1 is up, line protocol is up
Hardware is multilink group interface
Internet address is 155.13.45.4/24
MTU 1500 bytes, BW 128 Kbit/sec, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open, multilink Open
Open: IPCP, CDPCP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 2 seconds on reset
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 01:37:46
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 539
Queueing strategy: weighted fair
Output queue: 0/1000/64/539 (size/max total/threshold/drops)
Conversations 0/3/32 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 96 kilobits/sec
5 minute input rate 0 bits/sec, 6 packets/sec
5 minute output rate 1000 bits/sec, 0 packets/sec
27574 packets input, 1624852 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
23371 packets output, 4200099 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 unknown protocol drops
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
!!! R5
R5#sh ppp multilink
Multilink1
Bundle name: R4
Remote Endpoint Discriminator: [1] R4
Local Endpoint Discriminator: [1] R5
Bundle up for 00:16:40, total bandwidth 128, load 1/255
Receive buffer limit 12000 bytes, frag timeout 1000 ms
Interleaving enabled
0/0 fragments/bytes in reassembly list
0 lost fragments, 0 reordered
0/0 discarded fragments/bytes, 0 lost received
0x8666 received sequence, 0x61E7 sent sequence
Member links: 1 active, 0 inactive (max not set, min not set)
Se0/1/0, since 00:16:40, 160 weight, 152 frag size
No inactive multilink interfaces
R5#sh int s0/1/0
Serial0/1/0 is up, line protocol is up
Hardware is GT96K Serial
MTU 1500 bytes, BW 128 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation PPP, LCP Open, multilink Open
Link is a member of Multilink bundle Multilink1, loopback not set
Keepalive set (10 sec)
CRC checking enabled
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 01:38:33
Input queue: 0/75/1/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2000 bits/sec, 5 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
86437 packets input, 7687360 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
75447 packets output, 5091445 bytes, 0 underruns
0 output errors, 0 collisions, 6 interface resets
0 unknown protocol drops
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
14 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
R5#sh int multilink 1
Multilink1 is up, line protocol is up
Hardware is multilink group interface
Internet address is 155.13.45.5/24
MTU 1500 bytes, BW 128 Kbit/sec, DLY 100000 usec,
reliability 255/255, txload 5/255, rxload 7/255
Encapsulation PPP, LCP Open, multilink Open
Open: IPCP, CDPCP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 2 seconds on reset
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 01:39:01
Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/32 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 96 kilobits/sec
5 minute input rate 4000 bits/sec, 3 packets/sec
5 minute output rate 3000 bits/sec, 3 packets/sec
25132 packets input, 4064849 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
29325 packets output, 1916796 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 unknown protocol drops
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions