Xbar status "powered-dn"

[Jirasak Kajonkietlert]

Anyone know about xbar log ?  I found xbar status powered-dn on Nexus7710 after turn-on this log below.

switch# 2015 Jun 16 00:44:34 switch %$ VDC-1 %$ %XBAR-2-XBM_EEM_FABRIC_ACTION: Fabric slot 3 has been reloaded  by xbar-manager because of an eem-policy triggered action xbm_eem_err_mgmt_fn 864
2015 Jun 16 00:44:37 switch %$ VDC-1 %$ %PLATFORM-2-XBAR_DETECT: Xbar 3 detected (Serial number JAE1919081K)
2015 Jun 16 00:44:55 switch %$ VDC-1 %$ %PLATFORM-2-XBAR_DETECT: Xbar 3 detected (Serial number JAE1919081K)

switch#
switch# 2015 Jun 16 00:45:54 switch %$ VDC-1 %$ %XBAR-2-XBM_EEM_FABRIC_ACTION: Fabric slot 3 has been reloaded  by xbar-manager because of an eem-policy triggered action xbm_eem_err_mgmt_fn 864
2015 Jun 16 00:45:57 switch %$ VDC-1 %$ %MODULE-2-XBAR_FAIL: Initialization of xbar 3 (Serial number: JAE1919081K) failed

switch# sh mod
Mod  Ports  Module-Type                         Model              Status
---  -----  ----------------------------------- ------------------ ----------
1    24     10/40 Gbps Ethernet Module          N77-F324FQ-25      ok
5    0      Supervisor Module-2                 N77-SUP2E          active *
6    0      Supervisor Module-2                 N77-SUP2E          ha-standby

Mod  Sw              Hw
---  --------------  ------
1    6.2(12)         1.1     
5    6.2(12)         1.2     
6    6.2(12)         1.2     

Mod  MAC-Address(es)                         Serial-Num
---  --------------------------------------  ----------
1    b0-7d-47-db-c1-02 to b0-7d-47-db-c1-73  JAE192102N1
5    d8-b1-90-85-f2-0a to d8-b1-90-85-f2-1c  JAE191708LV
6    78-ba-f9-c4-66-ef to 78-ba-f9-c4-67-01  JAE19150FCP

Mod  Online Diag Status
---  ------------------
1    Pass
5    Pass
6    Pass

Xbar Ports  Module-Type                         Model              Status
---  -----  ----------------------------------- ------------------ ----------
1    0      Fabric Module 2                     N77-C7710-FAB-2    ok
3    0      Fabric Module 2                     N77-C7710-FAB-2    powered-dn
5    0      Fabric Module 2                     N77-C7710-FAB-2    ok

Xbar Power-Status  Reason
---  ------------  ---------------------------
3    powered-dn     Reset (powered-down) because module does not boot

Xbar Sw              Hw
---  --------------  ------
1    NA              1.2     
5    NA              1.2     

Xbar MAC-Address(es)                         Serial-Num
---  --------------------------------------  ----------
1    NA                                      JAE1920008N
3    NA                                      JAE1919081K
5    NA                                      JAE1921073B

JK.

[InayathUlla Sharieff]

could you try reseating the Xbar module?

[Kamran Mustafayev]

Hi,

Did you resolved this problem ?

[Gun Gokcearslan]

XBM EEM (xbar manager Embedded Event Manager) policy takes care of bringing down (power cycled) the appropriate card (linecard or fabric card). The policy is that if there 5 sync losses in 1 hour, then a card is power cycled. If there are less than this rate no action is taken.

a) If the LC loses sync with more than one fabric, then the LC is power cycled

b) If multiple LC loose sync with one fabric, then the fabric is power cycled  (Only if there are more than one fabric in the system)

c) If a line card loosing sync continuously with a fabric card and reaches EEM threshold, the fabric card is power cycled (unless if there is only one fabric card in the system).  

Note: In all the above cases, the software takes the least disruptive procedure to diagnose the failure, i.e. power cycling the fabric card (if there are more than one fabric card in the system) is the least disruptive procedure and then moves forward with the next least disruptive approach.