![]() ![]() Cisco IOS Commands. This is a list of Cisco IOS commands and information. IOS is the software used on the vast majority of Cisco Systems routers and most Cisco network switches. Set password for console access: (config)#line console 0(config- line)#login (config- line)#password < password_here> Set password for virtual terminal (telnet) access (password must be set to. Set password for auxiliary (modem) access: (config)#line. RAM)sh startup- config - . NVRAM. setup - Will start the the automatic setup; the same as when you first boot the routerconfig t - use to execute configuration. NVRAM; copies startup- config to running- configconfig net - used to retrieve configuration. TFTP server. copy running- config startup- config. RAM) to NVRAM or "write memory" for IOS under ver. NVRAM) to current running config (RAM). IOS file in flash to boot from. IOS file on the tftp server to boot fromboot system rom - tell router to boot from ROM at next boot. This is a list of Cisco IOS commands and information. IOS is the software used on the vast majority of Cisco Systems routers and most Cisco network switches. This document answers some of the most frequently asked questions (FAQ) about Cisco IP Phones. Cisco Call Manager Express 8.5 (Unified Communications Manager Express) introduced support for the Cisco 99 phones but it was lacking support for the.This document discusses and solves the most common problems that cause Cisco IP phones to fail to register with the Cisco CallManager. Add Disk To Windows Software Raid 5 Recovery . ![]() Copies flash to tftp server. Restores flash from tftp server. Copies the current running- config to tftp server. Restores the running- config from tftp server. Cisco IOS version, uptime of router, how the router started, where system was loaded from, the interfaces the POST found, and the. Your_message # - Set/change bannerhostname < router_name_here> - use to configure the hostname of the routerclear counters. Statistics sh processes - shows. Small, Middle, Big. Very Big, Large and Huge Buffers. Cisco Discovery Protocol uses layer 2 multicast over a SNAP- capable link to send data): sh cdp neighbor - shows directly connected neighbors sh cdp int - shows which interfaces are running. CDPsh cdp int eth 0/0 - show CDP info for specific interfacesh cdp entry < cdp_neighbor_here> - shows. CDP neighbor detail cdp timer 1. CDP info is sent (default cdp timer is. CDP neighbor. (default CDP holdtime is 1. CDP turned onno cdp run - turns off CDP for entire router (global config)no cdp enable - turns off CDP on specific interfacesh controller t. T1 linessh controller serial 1 - use to determine if DCE or DTE device(config- if)#clock rate 6. DCE (bits per second)(config- if)#bandwidth 6. Configure IP on an interface: int serial 0ip address 1. Other IP Commands: sh ip route. IP route ip route 0. MAC address of connected routersip address 2. Show all IP interfaces sh ip interface brief - Show brief overiew of IP interfaces sh ip nat translations - Show current IP NAT translations. Enable IPX on router. Configure IPX + IPX- RIP on an int. AOther Commands: sh ipx route. IPX routing table sh ipx int e. SAP table sh ipx traffic - view traffic statistics debug ipx routing activity - debugs IPS RIP packets debug ipx sap - debugs SAP packets. Other RIP Commands: debug ip rip - view. RIP debugging info router IGRP 2. Other IGRP Commands: debug ip igrp events - view IGRP debugging info debug ip igrp transactions - view IGRP debugging info. IP access lists are applies to which intsh ipx int ser 0 - use to view which IPX access lists are applies to which intsh appletalk int ser 0 - use to view which Apple. Talk access lists are applies to which int. View access lists: sh access- listssh ip access- listssh ipx access- listssh appletalk access- lists. Apply standard IP access list to int eth 0: access- list 1 deny 2. Apply Extended IP access list to int eth 0: access- list 1. Apply Standard IPX access list to int eth 0: access- list 8. Apply Standard IPX access list to int eth 0: access- list 9. IETF when setting up a frame- relay network between a Cisco router and a. Cisco routerframe- relay lmi- type ansi - LMI types are Cisco, ANSI, Q9. A; Cisco is the. default; LMI type is auto- sensed in IOS v. ARP won't work, map Other IP to Your DLCI # (local)keepalive 1. DLCI, LMI, and encapsulation infosh frame- relay pvc - shows the configured DLCI's; shows PVC traffic statssh frame- relay map - shows route mapssh frame- relay lmi - shows LMI info. CTRL- P - show previous command. CTRL- N - show next command. SHIFT- CTRL- 6 - Break Static Routing - manually assigned by the Admin user entering the routes. Routed Protocols - IP, IPX and Apple. Talk) Dynamic Routing - generated/determined by a Routing Protocol (Routing. Protocols - RIP I, RIP II, IGRP, EIGRP, OSPF, NLSP, RTMP). Dynamic. 1) With Dynamic Routing, routers pass information between each other so that routing tables are regularly maintained. 2) The routers then determine the correct paths packets should take to reach their destinations. 3) Information is passed only between routers. 4) A routing domain is called an Autonomous System, as it is a portion of the Internetwork under common admin authority. 5) Consists of routers that share information over the same protocol. Can be split into routing areas. I) Interior (within an autonomous system - AS - group of routers under the same administrative authority). Distance Vector - understands the direction and distance to any network connection on the internetwork. Knows how many hops (the metric) to get there. All routers w/in the internetwork listen for messages from other routers, which are sent every 3. They pass their entire routing tables. Uses hop count for measurement. Used in smaller networks that are have fewer than 1. Easy to configure and use. As routers increase in number, you need to consider CPU utilization, convergence time, and bandwidth utilization. Convergence is due to routing updates at set intervals. Whena router recognizes a change it updates the routing table and sends the whole table to all of its neighbors. 1) RIP - 1. IGRP - 2. 55 hop count max, uses reliability factor (2. RTMP. b) Link State - understands the entire network, and does not use secondhand information. Routers exchange LSP? Each router builds a topographical view of the network, then uses SPF (shortest path first) algorithm to determine the best route. Changes in topology can be sent out immediately, so convergence can be quicker. Uses Bandwidth. congestion for measurement; Dijkstra's algorithm; 1) Maintains Topology Database. Routers have formal neighbor relationship. Exchanges LSA (Link State Advertisement) or hello packets with directly connected interfaces. These are exchanged at short intervals (typically 1. Only new info is exchanged. Scales well, however link? Requires. more processing power, memory, and bandwidth. 1) OSPF - decisions based on cost of route (metric limit of 6. EIGRP - hybrid protocol (both Distance- Vector and Link State), Cisco proprietary 3) NLSP4) IS- ISII) Exterior 1) EGP (Exterior Gateway Protocol) 2) BGP (Border Gateway Protocol). Routing Protocols used for each Routed Protocol. IP - . RIP, IGRP, OSPF, IS- IS, EIGRP. IPX RIP, NLSP, EIGRP. RTMP, AURP, EIGRP1) Routing Loops - occur when routing tables are not updated fast enough when. Due to the slow convergence. This incorrect routing tables will cause packets to travel. Counting to infinity - occurs when packets end up in a routing loop. Solutions to Problems with Routing. Protocols. 1) Define the maximum number of. When the number of hops reaches this predefined value, the distance is. This does. stop routing loops, but only limit the time that packet can travel inside. Split horizon - The packets can not be sent back to the same interface that they. During the updates, one router does not send updates. Route poisoning - The router sets the cost/distance of routes that are unreachable to. Used with hold- down timers. Triggered updates - The router sends updates of the routing table as soon as it detects. Does not wait for the prescribed time to. Hold- Downs - After the router detects unreachable network, the routers waits for. The router. will also wait for a period of time before it updates its routing table. Router keeps an entry for the network possibly down state, allowing time for other routers to re- compute for this. Hold- downs can only partially prevent counting to infinity problem. Prevents routes from changing too rapidly in order to determine if a link has really failed, or is. Encapsulation. 80. Ethernet IIarpa (Internet Standard)Snapsnap. Customer premises equipment (CPE) - Devices physically located at subscriber? CSU/DSU, modem, wiring on. Demarcation (or demarc) - The place where the CPE ends and the local loop portion of the service begins. Usually in the "phone closet"). Local loop - Cabling from the demarc into the WAN service provider? CO. 4) Central Office switch (CO) - Switching facility that provides the nearest point of presence for the provider?
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