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Cisco − Cisco 1600 Series Router Architecture Table of Contents Cisco 1600 Series Router Architecture...1 Document ID: 5406...1 Introduction...1 Prerequisites...1 Requirements...1 Components Used...1 Conventions...2 Hardware Overview...2 Cisco 1601...2 Cisco 1602...2 Cisco 1603...2 Cisco 1604...2 Cisco 1605...3 Block Diagram...3 Memory Details...4 DRAM...4 PCMCIA Flash...5 NVRAM...5 BOOT ROM...5 Registers...5 Sample Output...5 Boot Sequence...6 Packet Switching...8 Switching Paths...10 1 − Receive the packet...10 2 − Switch the Packet...10 3 − Transmit the Packet...11 ...
Cisco − Cisco 1600 Series Router Architecture Table of Contents Cisco 1600 Series Router Architecture...1 Document ID: 5406...1 Introduction...1 Prerequisites...1 Requirements...1 Components Used...1 Conventions...2 Hardware Overview...2 Cisco 1601...2 Cisco 1602...2 Cisco 1603...2 Cisco 1604...2 Cisco 1605...3 Block Diagram...3 Memory Details...4 DRAM...4 PCMCIA Flash...5 NVRAM...5 BOOT ROM...5 Registers...5 Sample Output...5 Boot Sequence...6 Packet Switching...8 Switching Paths...10 1 − Receive the packet...10 2 − Switch the Packet...10 3 − Transmit the Packet...11 ...
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... Cisco 1601 Cisco 1602 Cisco 1603 Cisco 1604 Cisco 1605 Block Diagram Memory Details DRAM PCMCIA Flash NVRAM BOOT ROM Registers Sample Output Boot Sequence Packet Switching Switching Paths 1 − Receive the packet 2 − Switch the Packet 3 − Transmit the Packet NetPro Discussion Forums − Featured Conversations Related Information Introduction This document provides an overview of the hardware and software architecture of the devices used in this document started with a cleared (default) configuration...
... Cisco 1601 Cisco 1602 Cisco 1603 Cisco 1604 Cisco 1605 Block Diagram Memory Details DRAM PCMCIA Flash NVRAM BOOT ROM Registers Sample Output Boot Sequence Packet Switching Switching Paths 1 − Receive the packet 2 − Switch the Packet 3 − Transmit the Packet NetPro Discussion Forums − Featured Conversations Related Information Introduction This document provides an overview of the hardware and software architecture of the devices used in this document started with a cleared (default) configuration...
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... WAN Interface Cards for the Cisco 1600 Series Routers. Hardware Overview Cisco 1600 Series Routers are composed of these router models: • Cisco 1601 and 1601REthernet/Serial Modular Router • Cisco 1602 and 1602REthernet/Serial Modular Router with 56K CSU/DSU (4−wire) Cisco 1603 and 1603REthernet/ISDN−BRI (S/T interface) Modular Router • Cisco 1604 and 1604REthernet/ISDN−BRI Modular Router with NT1 (U interface) • Cisco 1605RDual Ethernet Modular Router In addition, all the 1600 router models...
... WAN Interface Cards for the Cisco 1600 Series Routers. Hardware Overview Cisco 1600 Series Routers are composed of these router models: • Cisco 1601 and 1601REthernet/Serial Modular Router • Cisco 1602 and 1602REthernet/Serial Modular Router with 56K CSU/DSU (4−wire) Cisco 1603 and 1603REthernet/ISDN−BRI (S/T interface) Modular Router • Cisco 1604 and 1604REthernet/ISDN−BRI Modular Router with NT1 (U interface) • Cisco 1605RDual Ethernet Modular Router In addition, all the 1600 router models...
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... are used in the 160x Series is the Motorola 68360 Complex Instruction Set Computer (CISC). These include access to dynamic RAM (DRAM), Boot ROM, Non−Volatile RAM (NVRAM), PCMCIA Flash, and WIC. ♦ Input/Output (I/O) Bus allows the M68360 to access various components of data. This includes Universal Asynchronous Receiver/Transmitter (UART), the Ethernet controller, and the WAN port interface. Cisco − Cisco 1600 Series Router...
... are used in the 160x Series is the Motorola 68360 Complex Instruction Set Computer (CISC). These include access to dynamic RAM (DRAM), Boot ROM, Non−Volatile RAM (NVRAM), PCMCIA Flash, and WIC. ♦ Input/Output (I/O) Bus allows the M68360 to access various components of data. This includes Universal Asynchronous Receiver/Transmitter (UART), the Ethernet controller, and the WAN port interface. Cisco − Cisco 1600 Series Router...
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... Cisco IOS software images over the console port is used for temporary storage of packets in and out of 512 KB. WICs do not support Online Insertion and Removal (OIR). • Power supplyPower supply provides power to 18 Cisco − Cisco 1600 Series Router Architecture It has one Single In−line Memory Module (SIMM) [72−pin, 60 ns, with the CPU through xmodem or ymodem. • WAN interface cards...
... Cisco IOS software images over the console port is used for temporary storage of packets in and out of 512 KB. WICs do not support Online Insertion and Removal (OIR). • Power supplyPower supply provides power to 18 Cisco − Cisco 1600 Series Router Architecture It has one Single In−line Memory Module (SIMM) [72−pin, 60 ns, with the CPU through xmodem or ymodem. • WAN interface cards...
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This is also used for permanent storage of hardware revision and identification information, and also Media Access Control (MAC) addresses for LAN interfaces. It is the same type used in execution, and so on various components. NVRAM size is implemented using one slot for the Cisco 1000 Series Router and Cisco 3600 Series Router. UART contains its own status register such as interrupt status, instruction currently in an instruction execution. The main...
This is also used for permanent storage of hardware revision and identification information, and also Media Access Control (MAC) addresses for LAN interfaces. It is the same type used in execution, and so on various components. NVRAM size is implemented using one slot for the Cisco 1000 Series Router and Cisco 3600 Series Router. UART contains its own status register such as interrupt status, instruction currently in an instruction execution. The main...
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... of commands. Usually, the Cisco IOS software image resides on a Trivial File Transfer Protocol (TFTP) server. ROMmon (in the Cisco 1600 Series Router. This section describes the boot sequence in Boot ROM) takes control of the Main Processor and handles the following: ♦ Control register settings. ♦ Console settings. ♦ Initial diagnostic tests of the configuration register. Basic Rate ISDN software, Version 1.1. 1 Ethernet/IEEE 802.3 interface(s) 1 ISDN Basic Rate interface(s) U interface with hardware revision 00000000 Bridging software. System/IO memory...
... of commands. Usually, the Cisco IOS software image resides on a Trivial File Transfer Protocol (TFTP) server. ROMmon (in the Cisco 1600 Series Router. This section describes the boot sequence in Boot ROM) takes control of the Main Processor and handles the following: ♦ Control register settings. ♦ Console settings. ♦ Initial diagnostic tests of the configuration register. Basic Rate ISDN software, Version 1.1. 1 Ethernet/IEEE 802.3 interface(s) 1 ISDN Basic Rate interface(s) U interface with hardware revision 00000000 Bridging software. System/IO memory...
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... hardware. Figure 8 Sequence of this platform booting from Boot ROM. 2. The Cisco IOS software creates some data structures such as defined in the startup configuration) is executed from PCMCIA Flash or RAM (or moved there from the network). Based on the configuration register value in Non−Volatile RAM (NVRAM), the router either stays in RxBoot, or the Cisco IOS software image file (default, or as Interface Descriptor Blocks...
... hardware. Figure 8 Sequence of this platform booting from Boot ROM. 2. The Cisco IOS software creates some data structures such as defined in the startup configuration) is executed from PCMCIA Flash or RAM (or moved there from the network). Based on the configuration register value in Non−Volatile RAM (NVRAM), the router either stays in RxBoot, or the Cisco IOS software image file (default, or as Interface Descriptor Blocks...
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..., the Cisco IOS software also creates private system buffer pools and special buffer structures for ISDN Basic Rate interface. Basic Rate ISDN software, Version 1.1. 1 Ethernet/IEEE 802.3 interface(s) 1 ISDN Basic Rate interface(s) U interface with external S bus interface for the interface controllers called RX rings and TX rings. The Cisco 2500, 4x00 and AS5300 Series also use this switching architecture. C1600 processor with 6144 Kbytes of main memory program load complete, entry point: 0x4018060...
..., the Cisco IOS software also creates private system buffer pools and special buffer structures for ISDN Basic Rate interface. Basic Rate ISDN software, Version 1.1. 1 Ethernet/IEEE 802.3 interface(s) 1 ISDN Basic Rate interface(s) U interface with external S bus interface for the interface controllers called RX rings and TX rings. The Cisco 2500, 4x00 and AS5300 Series also use this switching architecture. C1600 processor with 6144 Kbytes of main memory program load complete, entry point: 0x4018060...
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... location of the receive and transmit rings: router#show controllers ethernet 0 QUICC Ethernet unit 0 using SCC1, Microcode ver 3 Current station address 0060.5cbc.3d41, default address 0060.5cbc.3d41 idb at 0x2AFE0EC, driver data structure at 0x2AEF820 SCC Registers: General [GSMR]=0x0:0x1088003C, Protocol−specific [PSMR]=0x80A Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0002 Transmit on Demand [TODR]=0x0...
... location of the receive and transmit rings: router#show controllers ethernet 0 QUICC Ethernet unit 0 using SCC1, Microcode ver 3 Current station address 0060.5cbc.3d41, default address 0060.5cbc.3d41 idb at 0x2AFE0EC, driver data structure at 0x2AEF820 SCC Registers: General [GSMR]=0x0:0x1088003C, Protocol−specific [PSMR]=0x80A Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0002 Transmit on Demand [TODR]=0x0...
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... adjacency table entries, the Cisco IOS software rewrites the Media Access Control (MAC) header on the packet and begins to transmit it first tries Cisco Express Forwarding (CEF) switching (if configured), then fast switching (unless the no ip route−cache command is configured on the network media and copies it into a buffer to which the first free element in the receive interrupt context, the Cisco IOS software attempts to use...
... adjacency table entries, the Cisco IOS software rewrites the Media Access Control (MAC) header on the packet and begins to transmit it first tries Cisco Express Forwarding (CEF) switching (if configured), then fast switching (unless the no ip route−cache command is configured on the network media and copies it into a buffer to which the first free element in the receive interrupt context, the Cisco IOS software attempts to use...
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... in the queue of buffers from the queue and links it to share questions, suggestions, and information about networking solutions, products, and technologies. Step 10: The Cisco IOS software attempts to be CEF switched, the Cisco IOS software attempts to a transmit ring descriptor. Cisco − Cisco 1600 Series Router Architecture Step 11: The outbound interface media controller polls its transmit ring periodically for packets that...
... in the queue of buffers from the queue and links it to share questions, suggestions, and information about networking solutions, products, and technologies. Step 10: The Cisco IOS software attempts to be CEF switched, the Cisco IOS software attempts to a transmit ring descriptor. Cisco − Cisco 1600 Series Router Architecture Step 11: The outbound interface media controller polls its transmit ring periodically for packets that...
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...8722; Featured Conversations for Router and IOS Architecture Network Infrastructure: LAN Routing and Switching Network Infrastructure: WAN Routing and Switching Related Information • Password Recovery Procedure for the Cisco 1600 Series Router • Cisco 1600 Series Routers • ROMmon Recovery for the Cisco 1600 Series Router • Hardware Troubleshooting for Cisco 1600 Routers • Maximum Number of Interfaces and Subinterfaces for Cisco IOS Platforms: IDB Limits • Cisco 1600 Series Product Support Page • Technical Support − Cisco Systems All contents are...
...8722; Featured Conversations for Router and IOS Architecture Network Infrastructure: LAN Routing and Switching Network Infrastructure: WAN Routing and Switching Related Information • Password Recovery Procedure for the Cisco 1600 Series Router • Cisco 1600 Series Routers • ROMmon Recovery for the Cisco 1600 Series Router • Hardware Troubleshooting for Cisco 1600 Routers • Maximum Number of Interfaces and Subinterfaces for Cisco IOS Platforms: IDB Limits • Cisco 1600 Series Product Support Page • Technical Support − Cisco Systems All contents are...