In high loading time packet forwarding is stopping. Can’t ping to any interface. Just after the reboot of every thing is OK.
I increase SDRAM of the router from 32M to 128M and after changing no such problem.
Software of the router is very old and need upgrade it.
I check the configuration. About configuration every thing is OK. But they are configured very much ACL and NAT on the router.
Maybe router haven’t enough resource.
Customer use this how backbone router and configured many ACL. But this router can’t work under this loading. Because need increase hadware.