Tag Archives: Cisco IOS
Default Port and VLAN Configuration/Behavior on Cisco IOS switches
In this short lab, I use two Cisco Catalyst 3550 switches [IOS 12.2(44)SE6] to demonstrate the default port and VLAN behavior on a Cisco switch running IOS. Below is the network diagram for this lab.
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged 3550, auto-created trunk link, Catalyst, Cisco 3550 default configuration, Cisco auto-created trunk link, Cisco Catalyst, Cisco Catalyst 3550, Cisco Catalyst 3550 default configuration, Cisco Catalyst default configuration, Cisco default configuration, Cisco default port configuration, Cisco default VLAN configuration, Cisco IOS, Cisco IOS switch, Cisco IOS switches, DNS broadcast, IOS default configuration, omain Name System (DNS) broadcast, omain Name System broadcast, switchport mode, switchport mode access, switchport mode dynamic desirable, switchport mode trunk
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Gratuitous ARP and Basics of Connecting a Cisco IOS Switch with a Cisco CatOS Switch
Some of you may have an old Cisco Catalyst switch laying around that you may want to put to use. CatOS is the old Cisco operating system for Catalyst switches that predates IOS; it can still be found on some … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology
Tagged 1000Base-SX, 1000Base-SX GBI, CAM, Catalyst 3548-XL, Catalyst 3550, Catalyst 4003, Catalyst C4000, Catalyst C4003, CatOS, Cisco, Cisco 1000Base-SX, Cisco 1000Base-SX GBIC, Cisco Catalyst, Cisco Catalyst 3548-XL, Cisco Catalyst 3550, Cisco Catalyst 4000, Cisco Catalyst 4003, Cisco Catalyst C4003, Cisco CatOS, Cisco GBIC, Cisco IOS, Cisco WS-X4012, Cisco WS-X4232-GB-RJ, Cisco WS-X4232-L3, delete configuration, Dell, Dell EqualLogic, Dell EqualLogic storage, EqualLogic, erase configuration, GBIC, Gratuitous ARP, ios, IXIA, MAC address, MAC address table, reset configuration, Supervisor Engine, Supervisor Engine 1, Supervisor Engine 2, Supervisor Engine I, Supervisor Engine II, Windows PC, wireshark, WS-C3548-XL-EN, WS-X4012, WS-X4232-GB-RJ, WS-X4232-L3
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OSPF Explained and Useful Troubleshooting Commands
Open Shortest Path First (OSPF) is an open standard link-state routing protocol that supports multiple equal-cost routes to the same destination (four by default). OSPF constructs a shortest path tree and then updates the routing table with the best paths. … Continue reading
Posted in Cisco, Labs, Networking, Protocols, Technology, Troubleshooting
Tagged ABRs, adjacency, area 0, Area Border Routers, AS, ASBR, Autonomous System, Autonomous System Border Router, backbone area, Backup Designated Router, BDR, Cisco, Cisco 2126XM, Cisco 2126XM router, Cisco IOS, cisco router, cost, Designated Router, Hello packets, Link State Advertisement, LSA, neighbor, Neighbors, Open Shortest Path First, OSPF, OSPF Adjacencies, OSPF area, OSPF Backup Designated Router, OSPF BDR, ospf cost, ospf database, OSPF Designated Router, OSPF Hello Packets, ospf neighbor, OSPF Neighbors, OSPF process, OSPF Router ID, ospf troubleshooting, router, Router ID, Shortest Path First, shortest path tree, SPF
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