12000 BOX原装思科线卡模块产品简介

Most of the Cisco 12000 Series Internet 12000 BOX原装思科线卡模块Router route processors and line cards include Error Code Correction (ECC) functionality. There are, however, some existing line cards in the field that do not have the ECC capability. ECC functionality only covers the RAM or Synchronous Dynamic RAM (SDRAM) memory on the cards. The rest is not protected by ECC.

Here is a comparison of ECC functionality for line cards used with the Cisco 12000:

All Engine 2 and later cards have ECC functionality.

Engine 1 cards changed to ECC after FCS.

Engine 0 cards do not have ECC functionality.

Some cards can be upgraded to similar products that integrate the ECC functionality.

The table below lists the products that have the ECC functionality:

Non-ECC Products  ECC Products
GRP(=)  GRP-B(=)
GE-SX/LH-SC(=)  GE-GBIC-SC-B(=)
GE-GBIC-SC-A(=)  GE-GBIC-SC-B(=)
8FE-FX-SC(=)  8FE-FX-SC-B(=)
8FE-TX-RF45(=)  8FE-TX-RJ45-B(=)
6DS3-SMB(=)  6DS3-SMB-B(=)
12DS3-SBM(=)  12DS3-SMB-B(=)
OC12/SRP-IR-SC(=)  OC12/SRP-IR-SC-B(=)
OC12/SRP-MM-SC(=)  OC12/SRP-mm-SC-B(=)
OC12/SRP-LR-SC(=)  OC12/SRP-LR-SC-B(=)
Note: -B and ECC are independent. -B means the product is a second major orderable revision of the board. In some cases, this was the revision for ECC.12000 BOX原装思科线卡模块

Cisco offers a Technology Migration Plan (TMP) which allows you to upgrade a non-ECC board to a new ECC board. A credit will be applied to the purchase of the new ECC board in exchange for the non-ECC board.

Gigabit Route Processor (GRP) Parity Error Fault Tree Analysis 12000 BOX原装思科线卡模块

The flowchart below helps you determine which component of the Cisco 12000 Series Internet Router is responsible for parity/Error Code Correction (ECC) error messages on the Gigabit Route Processor (GRP).

 12000 BOX原装思科线卡模块

Note: Capture and record the show tech-support output and console logs, and collect all crashinfo files during parity/ECC error events.

Line Card Parity Error Fault Tree Analysis

The flowchart below helps you determine which component of a Cisco 12000 Series Internet Router line card is responsible for parity/Error Code Correction (ECC) error messages:

12000 BOX原装思科线卡模块 

Note: Whenever a line card experiences a parity/ECC error event, collect as much information as possible (see Troubleshooting Line Card Crashes on the Cisco 12000 Series Internet Router for details).

The Cisco 12000 Series Internet Router recovers from parity errors in other line card memories (SDRAM and SRAM) without crashing.

Parity/ECC Errors in the Cisco 12000 Series Gigabit Route Processor

Data with bad parity can be reported by several of the parity-checking devices for any read or write operation on the Cisco 12000 Series Internet Router.12000 BOX原装思科线卡模块

The GRP-B and the PRP use Single Bit Error Correction and Multi-bit Error Detection ECC to shared memory (SDRAM). A single bit error in SDRAM is corrected automatically, and the system continues to operate as normal.

Single-Bit Errors (SBEs) 12000 BOX原装思科线卡模块

PRP and GRP-B have the enhanced Dynamic RAM (DRAM) controller which supports ECC. Therefore, they can correct single-bit errors and report multi-bit errors. Correction of a single-bit error looks like this:

%Tiger-3-SBE: Single bit error detected and corrected at
SBEs are corrected by the Error Correction Circuit and do not affect the functionality of the GRP-B or the PRP. No action is required for single-bit errors, unless they happen frequently. In that case, it is advisable to replace the processor board.

Multi-Bit Errors (MBEs) 12000 BOX原装思科线卡模块

The detection of a multi-bit error is reported through a Bus Error Exception or a CPU Cache Parity Error Exception.

Processor Memory Parity Errors (PMPE) 12000 BOX原装思科线卡模块

A Processor Memory Parity Error message is reported if the CPU detects a parity error when accessing the processor's external cache (L3 on the GRP) through the SysAD bus, or either of the CPU internal cache memories (L1 or L2). Table 1 lists examples of the messages that would be printed out for each type of cache parity error: