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OSPF commands

Posted by Peter Kurdziel on October 26, 2008

sh ip ospf ?
<1-65535>            Process ID number
border-routers       Border and Boundary Router Information
database             Database summary
flood-list           Link state flood list
interface            Interface information
max-metric           Max-metric origination information
mpls                 MPLS related information
neighbor             Neighbor list
request-list         Link state request list
retransmission-list  Link state retransmission list
sham-links           Sham link information
statistics           Various OSPF Statistics
summary-address      Summary-address redistribution Information
timers               OSPF timers information
traffic              Traffic related statistics
virtual-links        Virtual link information
|                    Output modifiers

debug ip ospf ?
adj             OSPF adjacency events
database-timer  OSPF database timer
events          OSPF events
flood           OSPF flooding
hello           OSPF hello events
lsa-generation  OSPF lsa generation
mpls            OSPF MPLS
nsf             OSPF non-stop forwarding events
packet          OSPF packets
retransmission  OSPF retransmission events
spf             OSPF spf
tree            OSPF database tree

sh ip ospf int brief

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OSPF – 2 ways to enable the ospf process on an interface.

Posted by Peter Kurdziel on October 26, 2008

  1. the network statement under the routing process.
  2. ip ospf [process-id] area [area-id] at the interface level.

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EIGRP ways to advertise a default route

Posted by Peter Kurdziel on October 18, 2008

ip default-net  200.00.00.00

ip summ ei 1 0.0.0.0 0.0.0.0 <— with this all the previously advertised routes will be surpressed since all networks are a subnet of 0.0.0.0/0

 

From cisco.com

There are two ways to inject a default route into EIGRP: redistribute a static route or summarize to 0.0.0.0/0. Use the first method when you want to draw all traffic to unknown destinations to a default route at the core of the network. This method is effective for advertising connections to the Internet. For example:

ip route 0.0.0.0 0.0.0.0 x.x.x.x (next hop to the internet)
!
router eigrp 100
 redistribute static
 default-metric 10000 1 255 1 1500

The static route that is redistributed into EIGRP does not have to be to network 0.0.0.0. If you use another network, you must use the ip default-network command to mark the network as a default network. Refer to Configuring a Gateway of Last Resort for further information.

Summarizing to a default route is effective only when you want to provide remote sites with a default route. Since summaries are configured per interface, you do not need to worry about using distribute-lists or other mechanisms to prevent the default route from being propagated toward the core of your network. Note that a summary to 0.0.0.0/0 overrides a default route learned from any other routing protocol. The only way to configure a default route on a router using this method is to configure a static route to 0.0.0.0/0. (Beginning in Cisco IOS Software 12.0(4)T, you can also configure an administrative distance on the end of the summary-address command, so the local summary does not override the 0.0.0.0/0 route).

router eigrp 100
 network 10.0.0.0
!
interface serial 0
 encapsulation frame-relay
 no ip address
!
interface serial 0.1 point-to-point
 ip address 10.1.1.1
 frame-relay interface-dlci 10
 ip summary-address eigrp 100 0.0.0.0 0.0.0.0

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Dual boot XP/Linux

Posted by Peter Kurdziel on October 15, 2008

http://apcmag.com/how_to_dual_boot_windows_xp_and_linux_xp_installed_first.htm

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There’s a new GNS3 tutorial

Posted by Peter Kurdziel on October 11, 2008

New tutorial for GNS3

Submitted by admin on Mon, 10/06/2008 – 11:44

We are proud to publish a new tutorial for GNS3 made by Mike Fuszner. This tutorial describe step-by-step and with lot of screenshots how to use GNS3, it is particularly recommended for beginners.

More advanced users will also find some very useful information:

  • How to use virtual PC Simulator (VPCS) in GNS3.
  • The configuration of a multi-tabs console under Windows (WinTabber) and Linux (Konsole for KDE4).
  • Limit the CPU usage with BES (Windows) and CPULimit (Linux).
  • Create a symbol library for GNS3.

Thanks Mike for this great contribution!

get it here: http://voxel.dl.sourceforge.net/sourceforge/gns-3/GNS3-0.5-tutorial.pdf

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There was a mix up with my rack rental so I am installing ubuntu…

Posted by Peter Kurdziel on October 11, 2008

I installed ubuntu server edition. I soon realized that it does not come with a graphical interface. But I solved that with a quick google search.

I followed a GNS3 linux tutorial ( http://www.blindhog.net/tutorials/gns3-linux-install/gns3-linux-install.html )to install GNS3 and it was painless.

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