I've a small confusing regarding the following configuration on iBGP routerupdate-source loopbacknext-hop-selfIf i'm configuring iBGP neighbor using loopback interfaces i would normally add thecommand neighbor x.x.x.x update-source loopback 0 to spec...
Hello. I'm a bit confused about a particular concept related to OSPF. When we first initialize ospf the routers enter in the FLOOD STATE where LSAs are flooded for routers to build their LSDBs. My confusion is before flooding LSAs do routers go throu...
Can some help me out understand of disabling CEF on a particular interface?I tried the lab on GNS3. As depicted in the screenshot I disabled cef on both the interfaces f0/0 and f0/1 of R2no ip route-cache cefThe show ip int f0/0 | include CEF shows...
Can someone please help me out with this concept?The global config command ip cef enables CEF on R2To disable CEF on an interface i run the command no ip route-cache cefOn the above lab I disabled CEF on both interfaces of R2, yet the packet is route...
I was trying to configure CEF on gns3. The above are tow screenshots of the lab.From the debug output above we can see the ICMP packet is routed via FIB.The FIB and adjacency tables are used by CEF to forward packets in hardware.But the command sh i...
GreetingsI tried to modify the lab and i included VPCS.But it's the same result. With CEF enabled globally when i disabled CEF on both the interfaces of R2 the ICMP packet is still routed via FIB. On one screenshot we can see even i disabled fast swi...
Thank you so much.I've gone through loads of explanations on CEF but there seems to be amissing piece in the puzzle. When i disable CEF on an interface with thecommand *no ip route-cache cef. *The packetmust be process switched and not via FIB.
