Today while setting up a spare chassis to be used for burning in cards only, I noticed something that I never ran into. Two out of the 8 modules that I had loaded into the chassis were showing a status of PwrDeny (See Example 1.1). We can correct this by installing higher wattage power supplies or changing the power mode from redundant to combined mode. I personally would prefer to install the higher wattage power supplies, but due to circumstances out of my control, I ended up changing the power mode to combined. Pros and Cons are below as well.
Redundant Mode:
When running in Redundant Mode, each power supply provides approximately 50% of its capacity to the chassis. In the event of a failure, the unaffected power supply will then provide 100% of its capacity and an alert will be generated. As there was enough to power the chassis ahead of time, there is no interruption to service in this configuration. This is also the default and recommended way to configure power supplies
Combined Mode:
In combined mode, each power supply provides approximately 83% of its capacity to the chassis. This allows for greater utilization of the power supplies and potentially increased PoE densities
Source: http://en.wikipedia.org/wiki/Catalyst_6500
Example 1.1
6509E_BURN_IN#show mod
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
1 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX XXXXXXXXXXXX
2 8 CEF720 8 port 10GE with DFC WS-X6708-10GE XXXXXXXXXXXX
3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX XXXXXXXXXXXX
4 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX XXXXXXXXXXXX
5 5 Supervisor Engine 720 10GE (Active) VS-S720-10G XXXXXXXXXXXX
6 5 Supervisor Engine 720 10GE (Hot) VS-S720-10G XXXXXXXXXXXX
7 16 CEF720 16 port 10GE WS-X6716-10GE XXXXXXXXXXXX
8 16 CEF720 16 port 10GE WS-X6716-10GE XXXXXXXXXXXX
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
1 0023.5e7f.4ac0 to 0023.5e7f.4aef 3.0 12.2(18r)S1 12.2(33)SXI6 Ok
2 001e.f7f8.21e8 to 001e.f7f8.21ef 1.4 12.2(18r)S1 12.2(33)SXI6 Ok
3 0012.4376.c1d0 to 0012.4376.c1ff 2.1 Unknown Unknown PwrDeny
4 0021.55df.1ed0 to 0021.55df.1eff 2.8 12.2(18r)S1 12.2(33)SXI6 Ok
5 0025.84bf.7b08 to 0025.84bf.7b0f 3.1 8.5(3) 12.2(33)SXI6 Ok
6 001e.4a7e.e468 to 001e.4a7e.e46f 3.1 8.5(3) 12.2(33)SXI6 Ok
7 e05f.b974.a680 to e05f.b974.a68f 1.0 12.2(18r)S1 12.2(33)SXI6 Ok
8 e05f.b974.a860 to e05f.b974.a86f 1.0 Unknown Unknown PwrDeny
Mod Sub-Module Model Serial Hw Status
---- --------------------------- ------------------ ----------- ------- -------
1 Distributed Forwarding Card WS-F6700-DFC3B SAL12437YGQ 4.7 Ok
2 Distributed Forwarding Card WS-F6700-DFC3C SAL1223SNM7 1.0 Ok
3 Centralized Forwarding Card WS-F6700-CFC SAD0843019H 2.0 PwrDeny
4 Distributed Forwarding Card WS-F6700-DFC3B SAL1219Q4TH 4.6 Ok
5 Policy Feature Card 3 VS-F6K-PFC3C SAL1407B9EV 1.1 Ok
5 MSFC3 Daughterboard VS-F6K-MSFC3 SAL1407BJ77 2.1 Ok
6 Policy Feature Card 3 VS-F6K-PFC3C SAL1408BN6M 1.1 Ok
6 MSFC3 Daughterboard VS-F6K-MSFC3 SAL1407BFWL 2.1 Ok
7 Distributed Forwarding Card WS-F6700-DFC3C SAL15139YZ9 1.4 Ok
8 Distributed Forwarding Card WS-F6700-DFC3C SAL1513A3BP 1.4 PwrDeny
Mod Online Diag Status
---- -------------------
1 Pass
2 Pass
3 Not Applicable
4 Pass
5 Pass
6 Pass
7 Pass
8 Not Applicable
system power redundancy mode = redundant
6509E_BURN_IN(config)#power redundancy-mode combined
6509E_BURN_IN(config)#
6509E_BURN_IN(config)#end
!
6509E_BURN_IN#show power redundancy-mode
system power redundancy mode = combined
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