Cisco 10000 - Manual (Page 458)

19-40
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 19 Configuring Multilink Point-to-Point Protocol Connections
Verifying and Monitoring MLP Connections
Note Multilink subheaders are not part of the packet encapsulation because it exists at the bundle
level. Multilink subheaders are part of the encapsulation that is added to fragments before
placing them on the link; they are not added to the network-level datagrams (for example, IP
packets) before sending them to the fragmentation engine.
Because of the factors listed above, the counts on the links can be greater than the counts on the bundle.
The link level has a great deal of overhead that is not visible at the bundle level.
Verification Examples for MLP Connections
This section provides the following verification examples:
• Verification Example for the show interfaces multilink Command, page 19-40
• Verification Example for the show ppp multilink Command, page 19-40
• Verification Example for the show interfaces multilink stat Command, page 19-42
Verification Example for the show interfaces multilink Command
Example 19-10 shows sample output for the show interfaces multilink command. In the example,
configuration information and packet statistics display for the MLP bundle 8.
Example 19-10 Sample Output for the show interfaces multilink Command
Router# show interfaces multilink 8
Multilink8 is up, line protocol is up
Hardware is multilink group interface
Internet address is 10.1.1.1/24
MTU 1500 bytes, BW 15360 Kbit, DLY 100000 usec, rely 255/255, load
1/255
Encapsulation PPP, crc 16, loopback not set
Keepalive not set
DTR is pulsed for 2 seconds on reset
LCP Open, multilink Open
Open:IPCP
Last input 15:24:43, output never, output hang never
Last clearing of "show interface" counters 15:27:59
Queueing strategy:fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
36 packets input, 665 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
31 packets output, 774 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Verification Example for the show ppp multilink Command
Example 19-11 shows sample output from the show ppp multilink command. In the example,
information about the MLP over ATM bundle (Multilink3) displays first. Information about the member
links then displays, including the number of active and inactive member links. Class fields are omitted
from the output; everything is implicitly in receive class 0 and transmit class 0.