Tags » [OSPF]

Question : Why all other areas must be connected to ospf area 0(backbone)?

What I have read and know till now is since ospf behaves like distance vector protocol for inter area communication hence it is vulnerable to routing loops that’s why all the ABRs must be connected to ospf area0 and interarea communication happens through backbone area ….but you may ask that how distance vector in inter area communication ??The answer is ABR is the only router which propagates interarea routes within the area that means unlike the behaviour of distance vector where all the router must have the complete topology in link state router in a particular area would not know about the topology of another area and for interarea information routers just rely on ABR just like DUAL where router believes on its neighbor for the other routes in the network ….. 96 more words

Cisco

:OSPF Series: Do virtual links impact traffic flows?

No not by default, but they can. There are a few factors that will influence the outcome.  If we take a design with multiple exit points from an OSPF area. 929 more words

Blog

ISIS Continued...

Some more details about ISIS:

Packet types in ISIS :

Hello Packets : Just like other IGPs ISIS also uses hello packets to form the adjacency and as a keepalive mechanism. 511 more words

Routing

Configuring Cisco redistribution of OSPF to BGP with community filtering route-map

Configuring Cisco redistribution of OSPF to BGP with community filtering route-map
I was wondering about something to write about, and I hope this is an interesting subject. 19 more words

Configuring IPv6 OSPF routing in Cisco IOS

Configuring IPv6 OSPF routing in Cisco IOS
Hi guys! it’s time for me to write about configuration of OSPF IPv6 routing in Cisco IOS.
I will use example addresses from my workplace for this tutorial. 14 more words

Multiple Area OSPF Networks on Cisco – Part 2 of 2

Multiple Area OSPF Networks on Cisco – Part 2 of 2
Had a nice week everyone? I’ve been writing a lot and working a lot, but anyways here is part 2 of 2! 21 more words