Cisco CCNP Certification / BSCI Test Tutorial: Evaluating IRDP And HSRP
To go the BSCI exam, you have to know the difference between IRDP and HSRP. Although they've a similar basic operate, the Procedure and configuration of each and every are thoroughly different.
The intention of both of those is to permit hosts to promptly uncover a standby router when the key router fails. IRDP is often employed by Home windows DHCP clients and several other Unix versions, but you do see it in Cisco routers in addition. IRDP is outlined in RFC 1256.
IRDP routers will multicast Hi there messages that host products listen to. If a bunch hears from multiple IRDP router, it will pick one as its Key and can start off using the other router if the key it’s decided on goes down.
HSRP is often a Cisco-proprietary protocol which is designed 먹튀검증 for brief cutover into a secondary router if the principal fails, however the host products don’t “see” either the principal or secondary router. The hosts utilize a virtual router as their default gateway. This virtual router has its have IP and MAC address! All of the while, the router picked out as the principal is really the 1 accomplishing the routing. If the key router goes down, the secondary router promptly usually takes above without having major interruption to network providers.
The HSRP routers talk by multicasting updates to 224.0.0.two, and its through these hellos which the HSRP routers decide which router is Main and which happens to be secondary. HSRP is defined in RFC 2281.
The configuration of each and every of those might be included inside of a long term tutorial. Meanwhile, I urge you to definitely http://www.thefreedictionary.com/먹튀검증 go through the RFCs mentioned in this post, and check out www.cisco.com/univercd to read about the configurations and possibilities obtainable for each of these critical protocols.