User`s guide

54 • Chassis and Blade Installation R Series Data Center Products User’s Guide, Rev. B
Remote Management Card Configuration
Control Chain Auto-Negotiation
Two types of Remote Management Cards may be present in your network:
• Remote Management Module (RMM) in R4300 chassis
• Remote Management Card (RMC) in R4200 chassis
The RMC in Blade Switching (BSBP) and Direct Connect (DCBP) BackPacks is not
capable of auto-negotiation. A BCBP or DCBP with an RMC installed is always the
Primary in the Control Chain. RMCs can be installed only in BCBPs and DCBPs.
RMMs can only be installed in R4300 chassis. A BSBP without an RMC installed can
perform C/Port Switching, Admin Switching, and Sparing under the control of an RMC
or an RMM.
Each RMM in an R4300 series chassis provides an Ethernet connection, allowing it to
control a chain of as many as 14 chassis. If an RMM is not connected to Ethernet, it
does not auto-negotiate, and provides control and monitoring only for the chassis in
which it is installed.
The RMM has three auto-negotiation modes:
• Primary (including jumper-strapped Primary)
• Secondary
• Standby
The model for auto-negotiation assumes that a given network contains a mix of R4300
chassis, and legacy BSBPs and DCBPs.
The R4300 Remote Management Module uses the following auto-negotiation rules:
• An RMM must be active (i.e., powered up and functioning correctly) to assert its
status as Primary or other.
• If a jumper-configured RMM is present in a chain, that RMM is always Primary.
See Figure 26.
• Never jumper-configure an RMM in a Control Chain that also contains an RMC.
Figure 26 RMM Jumper Location
RMM (bottom view)
JP1
– Leave JP1 jumpered on pins 2 and 3
– Jumper Pins 1 and 2 to force Primary
for auto-negotiation (Default shown)
JP1
or remove jumper entirely