Dandy gives good advice about how to verify that the copied IOS is ok. I would like to supplement his comments with a comment about TFTP. The dots that you see during the transfer indicate that 1 (or more) packets were dropped during transmission. TFTP has a mechanism to recognize when dropped packets occur and to retransmit the missing packets. If the TFTP copy ran to the end and did not generate any error messages, then it is likely that the copy was ok and that the IOS file on the server is valid.
Following the advice given by Dandy will allow you to be very sure. But the presence of some dots during the TFTP transfer is not necessarily a reason to suspect that you wound up with a corrupt IOS.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...