Stubby Areas

OSPF can further reduce overhead by treating each area with one of several variations of rules, based on a concept called a stubby area. Stubby areas take advantage of the fact that to reach subnets in other areas, routers in an area must forward the packets to some ABR. Without stubby areas, ABRs m...

OSPF Adjacencies

OSPF creates adjacencies between neighboring routers for the purpose of exchanging routing information. Not every neighbor becomes adjacent in a broadcast environment. The Hello protocol is responsible for establishing and maintaining an adjacency. Hello packets are sent periodically out all rou...

RSVP-DiffServ Integration

RSVP-DiffServ integration provides a translation between RSVP and DiffServ technologies that is intended to leverage the strengths of each model. RSVP is used for bandwidth reservation at the edge of the network (where there are fewer flows and the most bandwidth constraints), but DiffServ is used o...

Using NBAR Classification

The NBAR feature is used to identify traffic within a class-map. You can then use the class-map in a policy-map to define how the router should handle each application data stream: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router1(config)#ip c...

Redirecting ICMP with HSRP

In older IOS releases, when you enable HSRP on an interface, the router will automatically disable ICMP redirection. However, starting with IOS Version 12.1(3)T, Cisco has changed how ICMP redirection works with HSRP, and it is now enabled by default. You can explicitly enable ICMP redirects on ...

Contact Us

86-136-2222-6316
CALL ME NOW

© 2011 CathaySchool, an ANDA Technology Group company, All Rights Reserved Privacy Policy | Refund Policy | Disclaimer | Sitemap | Resources Tags