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New Member

ppp multilink queuing question

The below configuration s1/0 and s1/1 is configured fair-queue, the multilink interface is configured fifo. Do I have a combination of fair-queue/fifo on these links or the fair-queue strategy is been ignored because fifo is configured on the multilink?

!

interface Serial1/0

no ip address

encapsulation ppp

fair-queue

ppp multilink

multilink-group 1

!

interface Serial1/1

no ip address

encapsulation ppp

fair-queue

ppp multilink

multilink-group 1

interface Multilink1

ip address 10.1.1.1 255.255.255.252

ppp multilink

multilink-group 1

2 REPLIES
New Member

Re: ppp multilink queuing question

The multilink interface parent config takes precedence over the child interface configs. For example, off a working box...

interface Multilink1

bandwidth 4096

ppp multilink

ppp multilink group 1

!

interface Serial0/0

bandwidth 2048

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 1

!

interface Serial0/1

bandwidth 2048

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 1

router#show int mu1

Multilink1 is up, line protocol is up

Hardware is multilink group interface

...

MTU 1500 bytes, BW 4096 Kbit, DLY 10000 usec,

reliability 255/255, txload 9/255, rxload 15/255

Encapsulation PPP, LCP Open, multilink Open

Open: IPCP, loopback not set

DTR is pulsed for 2 seconds on reset

Last input 00:00:00, output never, output hang never

Last clearing of "show interface" counters 6d22h

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 33

Queueing strategy: fifo

router#show int se0/0

Serial0/0 is up, line protocol is up

Hardware is GT96K Serial

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

reliability 255/255, txload 11/255, rxload 20/255

Encapsulation PPP, LCP Open, multilink Open, loopback not set

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 6d22h

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair [suspended, using FIFO]

FIFO output queue 0/40, 0 drops

5 minute input rate 166000 bits/sec, 198 packets/sec

5 minute output rate 94000 bits/sec, 196 packets/sec

68017631 packets input, 3149556926 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

71803478 packets output, 69897268 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

router#show int se0/1

Serial0/1 is up, line protocol is up

Hardware is GT96K Serial

MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,

reliability 255/255, txload 11/255, rxload 20/255

Encapsulation PPP, LCP Open, multilink Open, loopback not set

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 6d22h

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair [suspended, using FIFO]

FIFO output queue 0/40, 0 drops

5 minute input rate 166000 bits/sec, 198 packets/sec

5 minute output rate 94000 bits/sec, 196 packets/sec

68017905 packets input, 3149426478 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

2 input errors, 2 CRC, 0 frame, 0 overrun, 0 ignored, 1 abort

71804080 packets output, 69968875 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

New Member

Re: ppp multilink queuing question

Thank you so much for the clarification.

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