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Cisco Bug: CSCuq96222 - vPC LACP port goes to hot-standby after changing domain id

Last Modified

Sep 09, 2019

Products (12)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 5020 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5696Q Switch
  • Cisco Nexus 5548UP Switch
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Known Affected Releases

5.1(3)N2(1b) 6.0(2)N2(5) 7.0(4)N1(1)

Description (partial)

vPC LACP port in "primary, operational secondary" switch goes to hot-standby after changing vPC domain id, because  vPC system MAC in LAG-ID on "secondary, operational primary" switch is not changed even after changing vPC domain id.

changing vPC domain id in "primary, operational secondary" switch.
The issue can be recreated by the following steps:
i) shutdown all ports on the secondary switch (N5K-2)
ii) modify vPC domain id (10-->1) in the N5K-2
iii) shutdown all ports on the primary switch (N5K-1)
iv) no shutdown all ports on the N5K-2
v) modify vPC domain id (10-->1) in the N5K-1
vi) no shutdown vPC peer-link and keep-alive on the N5K-1
vii) no shutdown the rest of ports on the N5K-1
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