05-17-2020 09:34 PM
Hi,
I would like to know the Cisco supported devices for IP FRR.
Also is this a Layer-3 routing protocol or Layer-2 protocol?
05-18-2020 01:21 AM
Hello sreenath@akn.co.in ,
the basis of IP Fast ReRoute FRR is BFD = Bidirectional Forwarding Detection.
BFD is a very simple protocol that can be used between directly connected routers or multilayer devices to speed the detection of faults . Here the key is directly connected at OSI layer 3.
If two routers are connected using a switch in the middle when R2 interface fails R1 interface stays up and R1 will detect R2 failure when an appropriate timer ( OSPF dead interval or EIGRP hold time ) expires.
Insted of using very frequent hello messages in OSPF or other protocols that are rather complex to create and process BFD creates a simple keepalive mechanism.
The routing protocols become "clients" of the BFD session and their state will become dependent on the state of BFD.
BFD simplicity allows on distributed platforms like an ASR 9000 to perform the BFD processing on the linecards offloading the central CPU of the route processor from this duty.
So you can use the feature navigator and look for BFD support.
Note: IP FRR is not limited to BFD support but as a first sight on the matter it gives you the basic idea.
Hope to help
Giuseppe
05-18-2020 02:06 AM
Is this protocol supported on switches IE-3200-8P2S-E and C9200L-24P-4G-E?
05-18-2020 03:11 AM
Hello sreenath@akn.co.in ,
I don't think that industrial ethernet switches support BFD and IP FRR.
For industrial ethernet in ring topologies you can use REP resilient ethernet protocol that is specialized for ring topologies and can be very fast in reaction to a single link fault .
REP is an OSI layer 2 protocol like STP.
REP is not a routing protocol and supports only ring topologies.
Hope to help
Giuseppe
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide