Certified Internetwork Troubleshooting

NMP - Network Management Processor: governs the general control of the hardware, its configuration and diagnostic routines.

EARL -Enhanced Address Recognition Logic: similar to the function of a learning bridge or content addressable memory, responsible for maintaining the contents of the MAC information.

Only the Catalyst 5500 has full supervisor redundancy with a Supervisor II installed. Supervisor resilience is available only on the 13-slot chassis of the Catalyst 5500 switch. No software commands are needed to enable this functionality. You can use the Catalyst 5500 series switch to create a high-speed, fault-tolerant environment that supports mission-critical applications by using a second supervisor module in the chassis of your switch. The second supervisor module takes over in case of the failure of the active supervisor module. When you use two supervisor modules in the chassis to provide redundancy, the first supervisor module to come up is considered the active module. The second supervisor module remains in standby mode.
All network management functions, such as Simple Network Management Protocol (SNMP), command-line interface (CLI) console, Telnet, spanning tree, Cisco Discovery Protocol (CDP), and virtual LAN (VLAN) Trunk Protocol (VTP) take place on the active supervisor module. The Ethernet ports on the standby supervisor module are inactive in the same way that enabled ports on disabled modules are inactive. The console port on the standby supervisor module is also inactive. The redundant supervisor modules operate in the first two slots of the 13-slot chassis. The supervisor modules are hot-swappable, and in the redundant configuration, the system continues to operate with the same configuration after switching over to the redundant supervisor.

PHOENIX ASIC-A gate array ASIC used to connect the switching buses. Available on SUP III. Supports 3.6Gbps crossbar fabric, layer 3 switching support with EARL II, CISCO IOS support.

In addition to the correct answers above you should also be aware that the Catalyst 5550 3.6-Gbps media-independent fabric supports Ethernet, Fast Ethernet, FDDI/CDDI, ATM LAN Emulation, and RSM modules. In addition the 5-Gbps cell-based fabric supports an ATM switch processor (ASP) module and ATM port adapter modules (PAMS). The Cisco Catalyst 5000 series route switch module builds upon the Route Switch Processor (RSP) featured in Cisco's 7500 routing platform. The route switch module provides high-performance multilayer switching and routing services between switched Virtual LANs (VLANs), emulated LANs (ELANs) within an Asynchronous Transfer Mode (ATM) fabric, or across mixed media via an optional Versatile Interface Processor (VIP) and port adapters.

MCP-Master Control Processor. The primary function of the MCP is to communicate information between the NMP and the line module communication processors (LCPs) distributed on the Catalyst 5000 line modules. This occurs across the management bus, which is a serial bus at 761 kbps. Functions of the MCP include: Test and configuration of local ports, Control local ports using local target logic (LTL) and color blocking logic (CBL), Local diagnostics of onboard RAM, SAINT, ASICs, LTL and CBL, Support download of run-time code.

LTL-Local Target Logic. Used to select which port or ports on the switching bus are to receive the current packet on the bus. This is on each line module. Reference: Cisco Official Documentation CD/ Multi-Layer LAN Switches Objective: Use proven problem isolation techniques to list the symptoms of Catalyst 5000 â and VLAN problems on switched Ethernet networks.

CBL-Color Blocking Logic. Blocks VLAN traffic going out of a port or coming in from a port, it also assists spanning tree in blocking ports to prevent loops.

CBL-Color Blocking Logic. Blocks VLAN traffic going out of a port or coming in from a port, it also assists spanning tree in blocking ports to prevent loops. NMP-Network Management Processor. The NMP uses system software that governs the control of the hardware, its configuration, and diagnostics routines, including the loading of run time code to the line modules. The NMP performs the following: System Control, System Configuration, System Diagnostics, Spanning Tree Per VLAN, Network Management CLI.

SAINT- Synergy Advanced Interface and Network Termination. Used to perform encapsulation of the Ethernet frames before they cross the switching bus. Each dedicated Ethernet and Fast Ethernet port has its own SAINT ASIC and 192 KB of dedicated frame buffer. The only line module that are not dedicated is the group switching module, this uses four SAINTs.

SAMBA-Synergy Advanced Multipurpose Bus Arbiter. Located on both the Supervisor and Line Modules. Provides arbitration to the switching bus. Works in either master or slave mode. SAMBA in master mode is located on the Sup and SAMBA in slave mode is on the line module. Master can support 13 line cards and slave can support 48 ports on a single device. Supports broadcast suppression when SAMBA is in slave mode. Counters gather statics.

SAGE-Synergy Advanced Gate Array Engine. This is similar to the SAINT without Ethernet MAC. It is used with the ATM and FDDI MAC layers, has 1 to 2 MB of additional buffering.

In band management means management "through" the network, while out of band management is using methods not through the network (eg: Console and an Asynchronous Modem Connection).

In-band management means management "through" the network, while Out-of-band management is using methods not through the network (eg: Console and an Asynchronous Modem Connection).

The RMON mib supports 4 groups which are statistics, history, alarms and event group. SPAN (Switched Port Analyzer) lets you monitor traffic from across a VLAN to a single port for analysis. Rmon solutions such as vlan director, traffic director, and CiscoView delivers a management system for a growing switched network, the RMON functionality is contained in the NMP (Network Management Processor).

NMP-Network Management Processor. The NMP uses system software that governs the control of the hardware, its configuration, and diagnostics routines, including the loading of run time code to the line modules. The NMP performs the following: System Control, System Configuration, System Diagnostics, Spanning Tree Per VLAN, Network Management CLI.

NMP-Network Management Processor. The NMP uses system software that governs the control of the hardware, its configuration, and diagnostics routines, including the loading of run time code to the line modules. The NMP performs the following: System Control, System Configuration, System Diagnostics, Spanning Tree Per VLAN, Network Management CLI.

EARL-Encoded Address Recognition Logic. This is similar in function to the learning bridges or content addressable memory (CAM) used on other systems. Listens and learns MAC addresses. Associates source port, VLAN ID, and MAC address. The EARL stores up to 128,000 addresses. Stores addresses for 300 seconds (default), can configure between 60 to 1200 seconds.

The SwitchProbeTM (Switched Port Analyzer) gives superior network management and the ability to perform protocol analysis from a single location. The SwitchProbe (Switch Port Analyzer) provides the latest technology for monitoring switch-based networks and helps to reduce the cost of managing these networks. It is included with the Catalyst series switches.

Cisco Works for Switched Internetworks is a complete management package. Its list of features include: 1. Graphical display of the physical devices and links in your network 2. Remote Monitoring (RMON) and protocol analysis, as well as troubleshooting of protocol-related problems 3. Graphical display of Asynchronous Transfer Mode (ATM) switches, physical links, permanent and switched virtual circuits, as well as performance monitoring of ATM switches and links and traffic analysis of RMON-enabled ATM links 4. End-station and user ID information and tracking database, as well as configuration information from Media Access Control-Virtual LAN (MAC-VLAN) mapping 5. Graphical display for configuring, modifying, and managing VLANs 6. Graphical representation of individual devices useable in configuring and monitoring chassis, port, and interface information CiscoWorks for Switched Internetworks has been replaced by the CiscoWorks 2000 software.

The smartnet information and warranty information is taken prior to being placed in the call queue to be dealt with by a Cisco CSE.

A CCO designed utility for reporting and finding bugs in IOS software and hardware.

The management toolkit is designed to deal with active cases, opening a case or updating a case.

Debug Serial Interface is an important command to see information about frame-relay updates and whether both sides of the connection are communicating.

The clear interface command will reset that interface entirely. And since this was a command question the malfunctioning CSU/DSU would not apply.

It is only a recommendation, however using VLAN ID 1for Management and SNMP can help keep the network standardized.

The key word is "TCP". If a user can make some of the connections and not others it is most likely the the router is running an access-list the denys access to some TCP ports. Remember there is a implicit "deny any" at the end of all access-lists. Whatever is not approved will be denied unless otherwise stated.

Internal buffer logging creates the least overhead. To a syslog server is the next option that creates the least overhead.

It is never a good idea to configure VTP servers offline. The dynamic nature of the VTP domain creates the need to configure VTP Servers online.

This bit will be set to 1 for the receiver of the call.

ARP (Address Resolution Protocol) is the protocol used to map static MAC address to their dynamic IP counterparts.

VLAN ID and Port of Origin are what ISL adds to an ethernet frame. All of this increases the packet size by 30 bytes.

Since ATM does not handle broadcasts and neither do WAN switches, they will not accept or report CDP information. CDP (Cisco Discovery Protocol).