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Can somebody tell me what's the difference on the following interfaces on 2500: High Speed Sync Serial; Low Speed Async/Sync; High Speed Async Serial and when to use which?Thanks.
I entered "router isis" in the config mode and this was supposed to put me in the "config-router" mode, but nothing happened. What's wrong?IOS: 12.1, feature set: IP only, router: 2621.
