Cisco Cisco Nexus 5010 Switch デザインガイド
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Figure 6. UDLD Probe Intervals
UDLD normal mode uses the default 15-second message interval, which is also compatible with ISSU.
[…]
Current bidirectional state: bidirectional
Current operational state: advertisement - Single neighbor detected
Message interval: 15
During an ISSU upgrade, the Cisco Nexus 5000 Series Switch negotiates a higher message interval with the UDLD
peer, and sets it to 60 seconds:
Neighbor echo 1 devices: TBM12162254
Neighbor echo 1 port: Ethernet2/9
Message interval: 60
PortChannel on Cisco Nexus 5000 Series
There are hardware differences between the Cisco Nexus 5500 platform and the other Cisco Nexus 5000 Series
Switches because of the higher port density that the Cisco Nexus 5500 platform supports. On the Cisco Nexus
5500 platform, every single port can be a PortChannel; this is true for the Cisco Nexus 5548P, 5548UP, and
5596UP.