Reference Guide

444 | Interfaces
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Table 21-48 lists the range for each transmission media.
Link Bundle Monitoring
Link Bundle Monitoring is supported only on platform:
Monitoring linked LAG bundles allows traffic distribution amounts in a link to be monitored for unfair
distribution at any given time. A threshold of 60% is defined as an acceptable amount of traffic on a
member link. Links are monitored in 15-second intervals for three consecutive instances. Any deviation
within that time causes a Syslog to be sent and an alarm event to be generated. When the deviation clears,
another Syslog is sent and a clear alarm event is generated.
The link bundle utilization is calculated as the total bandwidth of all links divided by the total
bytes-per-second of all links. If monitoring is enabled, the utilization calculation is performed when the
utilization of the link-bundle (not a link within a bundle) exceeds 60%.
Enable link bundle monitoring using the
ecmp-group command.
View all LAG link bundles being monitored using the
show running-config ecmp-group command.
Ethernet Pause Frames
Ethernet Pause Frames is supported on platforms c e s
Threshold Settings are supported only on platforms: c s
Ethernet Pause Frames allow for a temporary stop in data transmission. A situation may arise where a
sending device may transmit data faster than a destination device can accept it. The destination sends a
PAUSE frame back to the source, stopping the sender’s transmission for a period of time.
The globally assigned 48-bit Multicast address 01-80-C2-00-00-01 is used to send and receive pause
frames. To allow full duplex flow control, stations implementing the pause operation instruct the MAC to
enable reception of frames with destination address equal to this multicast address.
The PAUSE frame is defined by IEEE 802.3x and uses MAC Control frames to carry the PAUSE
commands. Ethernet Pause Frames are supported on full duplex only. The only configuration applicable to
half duplex ports is
rx off tx off.
Note that if a port is over-subscribed, Ethernet Pause Frame flow control does not ensure no loss behavior.
Table 21-48. MTU Range
Transmission Media MTU Range (in bytes)
Ethernet 594-12000 = link MTU
576-9234 = IP MTU