Ashwini,
Can you tell me what Switch/router is acting as the gateway for 100.0.0.0/24 and 100.1.1.0/24 assuming they are /24?
What devices are routing and which are L2?
Can you show the output of "show iproute" on the routers running BGP.
This may not be the issue but something to check I only say this because I have seen this recently and it was the same very Odd behavior. LR Optics so your using single mode 1310nm... verify the fiber and patches are all Single mode(generally yell...
You may want to run a Diagnostic on the hardware. This will require the switch to reboot and be taken out of service.
To run diagnostics on Summit family switches, use the following command:
run diagnostics [extended | normal | stack-port]
Wh...