9-9
Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5
78-18133-01
Chapter 9 Configuring Link Aggregation on the ML-Series Card
Monitoring and Verifying EtherChannel and POS
Example 9-7 show interfaces port-channel Command
ML_Series# show int port-channel 9
Port-channel9 is down, line protocol is down
Hardware is FEChannel, address is 0000.0000.0000 (bia 0000.0000.0000)
Internet address is 192.26.24.22/25
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
No. of active members in this channel: 0
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/300/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes
Received 0 broadcasts (0 IP multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast
0 input packets with dribble condition detected
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Load Balancing on the ML-Series cards
The load balancing for the Ethernet traffic on the portchannel is performed while sendi ng the frame
through a port channel interface based on the source MAC and destination MAC address of the E thernet
frame.
On a 2 port port channel interface, the Unicast Ethernet traffic (Learned M AC with unicast SA and DA)
is transmitted on either first or second member of the port-channel based on the result of the "Exclusive
OR" (XOR) operation applied on the second least significant bits (bi t 1) of DA-MAC and SA-MAC. So,
if the "XOR" result of the Ethernet frames SA-MAC second least significant bit and DA-MAC second
least significant bit is 0 then the frame is sent on the first member and if the result is 1 then the frame is
transmitted on the second member port of the port channel.
Table 9-1 MAC Based- 2- Port Channel Interface
Second Least
Significant bit of the
MAC-DA
Second Least
Significant bit of the
MAC-SA XOR Result
Used Member Interface
for the Frame
Forwarding to the
EtherChannel and/or
Port Channel
000Port 1
011Port 2