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What is the difference between FRM220-10/100I and FRM220-10/100A? |
Basically, if you need in-band managed converters but they will always be used as line cards in FRM220-CH20 or connected to CH20, then the 10/100i is the most cost effective solution. If you need converters with in-band management but also require that they be manageable stand-alone (without FRM220-CH20), then the FRM220-10/100A is the right choice.
Let me explain in detail the difference between the 10/100i and 10/100A below.
I. FRM220-10/100i
The 10/100i is designed for use with the FRM220-CH20 chassis with NMC (network management card). When the 10/100i is installed in the chassis, it can be fully managed. This includes setting auto or forced mode, selecting switch or converter mode (converter mode supports jumbo frame with 100Base-TX to 100Base-FX conversion), enable/disable ALS (auto laser shutdown), providing bandwidth control (ingress/egress in nx32K or nx512K steps), display all link states and enable or disable the converter. It can also sense FEF (far end fault) including dying gasp.
The 10/100i uses a Fast Ethernet chip that supports OAM function (TS-1000, a Japanese OAM standard). The OAM adds management field to standard Ethernet packets and removes this field at the destination (remote 10/100i converter). This creates a transparent and non-intrusive data stream in both directions that is used to do the remote management and remote monitoring. All remote configuration, remote status, loopback, and remote upgrade is done without effecting the Ethernet traffic. The 10/100i has no DIP setting and can only be managed either when placed in FRM220-CH20 chassis or if connected by fiber to a managed line card in FRM220-CH20 chassis. There is NO provision for stand-alone management or configuration. The remote 10/100i may be a FRM220-10/100i line card placed in any one of four single slot chassis options;
1. CH01 (with external AC switching power adapter)
2. CH01AC (built-in AC power)
3. CH01DC (built-in DC power)
4. CH01AD (built-in dual AC+DC power).
Additionally, the FMC-10/100i may be used as a remote media converter when connected by fiber to the FRM220-10/100i line card in CH20 chassis. The FRM220-10/100i and FMC-10/100i cannot be used as a stand-alone point-to-point converters because they have no stand-alone provisioning.
II. FRM220-10/100A
The FRM220-10/100A (the 'A' stands for o'A'm) uses a Fast Ethernet chip which supports in-band management protocol. The protocol is different than that used in the 10/100i (so they are not compatible), but it uses the current industry standard IEEE protocol for Operation Administration Maintenance, 803.2ah. The FRM220-10/100A has a 32 bit embedded processor which allows it to be managed as a standalone unit (with Telnet, Web or SNMP) in any single slot chassis or it may be placed in the FRM220-CH20 chassis and managed from the CH20's NMC. When a remote FRM220-10/100A converter in single slot chassi is connected by fiber to a FRM220-10/100A line card in managed CH20 chassis, the remote unit may be managed from the CH20's NMC with non-intrusive 802.3ah-OAM. The FRM220-10/100A also supports provisioning for auto or forced mode, bandwidth control, port enable/disable, ALS, etc.
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