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  • Archive for June, 2009

    GNS3 – Start Your Lab

    Wednesday, June 10th, 2009

    GNS3 is a good simulator, and many people use it. B Haines has written a post about the GNS3, maybe useful for you! I wanted a reference to get GNS3 installed and running with links to important sites so here it is! Enjoy! I. First you need to download and install GNS3. It is available [...]

    Simple configuration of Context-Based Access Control

    Tuesday, June 9th, 2009

    Technical characteristics: 1. Traffic filtering CBAC checks not only the information of the network layer and the transport layer but also the information of the application layer. It can also filter the http traffic and block java plug-in 2. Traffic monitoring CBAC monitors the traffic passing through the router and handles the TCP and UDP [...]

    EIGRP Stub Routers

    Monday, June 8th, 2009

    Enhanced Interior Gateway Routing Protocol (EIGRP), Cisco’s proprietary yet hugely successful and widely deployed routing protocol, is known to behave disappointingly in inadequately designed networks. Cisco has improved EIGRP’s behavior dramatically with the introduction of stub routers in Cisco IOS release 12.0(7)T (integrated in IOS release 12.1, thus being available for a number of years). [...]

    R&S Quick Notes – Frame-Relay/PPP

    Monday, June 8th, 2009

    Frame-Relay DHCP on a frame interface : “frame-relay interface-dlci 555 protocol ip 166.166.166.2″ When asked to disable INARP, be sure to do so on physical interfaces any multipoint sub-interfaces. If you see 0.0.0.0 frame mappings, save your config and reload. The backup command can NOT be used on FR physical interfaces. (no way to detect [...]

    Pass4sure Corporate Video

    Monday, June 8th, 2009

    Tags: Pass4sure

    IPv6 EUI-64 interface addressing

    Sunday, June 7th, 2009

    One of IPv6′s key benefits over IPv4 is its capability for automatic interface addressing. By implementing the IEEE’s 64-bit Extended Unique Identifier (EUI-64) format, a host can automatically assign itself a unique 64-bit IPv6 interface identifier without the need for manual configuration or DHCP. This is accomplished on Ethernet interfaces by referencing the already unique [...]

    How to configure PPPoE?

    Sunday, June 7th, 2009

    PPPoE provides an emulated (and optionally authenticated) point-to-point link across a shared medium, typically a broadband aggregation network such as those found in DSL service providers. In fact, a very common scenario is to run a PPPoE client on the customer side (commonly on a SOHO Linksys or similar brand router), which connects to and [...]

    Few Words – IP Prefix Lists

    Saturday, June 6th, 2009

    Ip prefix-list provides the most powerful prefix based filtering mechanism Here is a quick little tutorial on Prefix-lists for you. A normal access-list CANNOT check the subnet mask of a network. It can only check bits to make sure they match, nothing more. A prefix-list has an advantage over an access-list in that it CAN [...]

    CCIE R&S Core Knowledge Question(10)

    Friday, June 5th, 2009

    1. R1#show frame pvc interface serial 1/0 PVC Statistics for interface Serial1/0 (Frame Relay DTE) Active     Inactive      Deleted       Static Local          1            0            0            0 Switched       0            0            0            0 Unused         0            0            0            0 DLCI = 103, DLCI USAGE = UNUSED, PVC STATUS = ACTIVE, INTERFACE = Serial1/0 input pkts 0             output pkts 0            in [...]