Skip to main content

EIGRP K-values


The ultimate variables that decide whether a particular metric component should contribute towards EIGRP metric calculation or not are the EIGRP K-values.





There are 5 in all, K1 to K5 with K1 (in conjunction with Bandwidth) and K3 (in conjunction with Delay) used primarily for EIGRP metric calculation.





The K-values are not interface specific but router specific, meaning, the same set of K-values would be applicable to all the interfaces of a particular EIGRP router. Of course, changes can be done under "router eigrp ASN" command and not under interface. The command "show ip protocols" would display the current K-values.





show ip protocols (EIGRP K-values)




Let us now modify the K-values..





EIGRP metric weights








The excerpt shows that the moment K values are modified, the EIGRP adjacency goes down due to the mismatch of K-values with the neighboring router. The changes are reflected again by using the command : show ip protocols


Labels:

Comments

Post a Comment

Popular posts from this blog

Checkpoint - Exporting Objects in CSV format

Be it a Network Operations Manager, Security Architect or a Security Auditor, the people up the hierarchy always harangue the Security Engineers to compile the list of firewall objects or rules or policies or the traffic statistics and so on.. This can turn out to be quite hectic especially if there are no built in features to systematically provide the output in a "layman-readable" format. Come, Checkpoint's "Object Explorer..."  which not only provides the output in the "layman-readable" format, but also provides in-built filtering mechanisms, thereby ensuring that the Security Engineer doesn't have to rely on Google for building his scarce Microsoft Excel data filtering skills. The following screenshots will show how easy it is, with Checkpoint R80.10 to generate the firewall configuration inventory. On the SmartConsole Unified Portal, navigate to Menu >> Open Object Explorer... Select the Categories you wish to see in your output: Click o
Post a Comment
Read more

MITRE ATT&CK - Kerberos Vulnerabilities and Security

From the previous post, the summary of Kerberos authentication process is as below: For the initial authentication, the user’s client machine sends a request to the KDC  Authentication Service (AS) . The request includes details like the user’s username, and the date and time. All information except the username is encrypted using the hash of the user’s password. The KDC AS uses the username to look up its copy of the user’s password hash and uses it to decrypt the rest of the request. If the decryption is successful, that means the client used the correct password hash and the user has successfully authenticated. Once the user is authenticated, the KDC AS sends the user’s client a  ticket granting ticket   (TGT) . The TGT includes a unique session key and a timestamp that specifies how long that session is valid (normally 8 or 10 hours). Importantly, before sending the TGT, the KDC encrypts it using the password hash for a special account, the  KRBTGT account.  That password hash is s
3 comments
Read more

AWS Workspaces - Unhide C drive

AWS Workspaces Windows 10 has C:\ drive hidden by default.. To unhide it, locate the following directory in Windows Registry (regedit), HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\ Explorer Dword Value - NoDrives. By default it is set to Hexidecimal value of 4.. Change it to Hexidecimal value of 0 Restart the Workspace and C:\ drive should be visible.
Post a Comment
Read more