While studying for SPCORE I learned about this behavior: And I tested this in Junos using routing instances and lt interfaces: ylara@R1# show | display set relative set R1 instance-type virtual-router set R1 interface lt-0/0/0.1 set R1 interface lo0.1 set...
Tag: ospf
JNCIE, JNCIP, SERVICE PROVIDER
ISIS NARROW and WIDE METRICs
Today we will talk about ISIS narrow metrics and wide metrics, but as always, let me give you some background first. We start by looking at the ISIS PDUs (Packet Data Units), which is the term used to refer to...
ENTERPRISE, JNCIA, JNCIE, JNCIP, JNCIS, SERVICE PROVIDER
OSPF SUMMARY
OSPF PACKET TYPES HELLO PACKETS Adjacencies formation: An adjacency could fail if there is a mismatch of any of the following parameters: MTU (stuck in exstart) Network address Subnet mask Hello interval and/or dead interval Area typeAuthenticationArea idInterface type (broadcast,...
ENTERPRISE, JNCIE, JNCIP, SERVICE PROVIDER
OSPF vs. ISIS
Long ago, when I didn't know much about ISIS, and I mostly worked with customers running OSPF, I used to think of ISIS as a strange routing protocol, that nobody really cared much about. But I was sooo wrong! I...
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