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Category: Practical – Cisco

Configuring simple MPLS network

Objective

Create a simple MPLS network and observe partial parts of MPLS functionality. MPLS network consist of four routers, two edge routers - LSE1 and LSE2 whose fastEthernet interfaces are not parts of the MPLS network and two Label Switch Routers - LSR1 and LSR2 interconnected through serial lines.

Topology

Four routers are connected in a chain line topology:

Cisco-Linksys SRW 248G4 – system firmware recovery

In this article I will describe how to proceed if your firmware upgrade on SRW 248G4 switch failed and the switch then stop working.

I have found only one solution how to recover from this disaster and it is sending a new firmware over PC serial (COM) port using xmodem protocol. A new firmware can be send to the failed switch with the help of Startup menu of the switch. The Startup menu can be entered when the switch is booting.