Discussion

1.20 Backing Up Filesystems on J-Series Routers 46
1.21 Restoring a Backed-Up Filesystem 48
1.22 Installing a Different Software Release on M-Series
and T-Series Routers 49
1.23 Installing a Different Software Release
on J-Series Routers 51
1.24 Creating an Emergency Boot Disk 52
1.25 Gathering Software Version Information 54
1.26 Gathering Hardware Inventory Information 58
1.27 Finding Out How Long the Router Has Been Up 60
1.28 Gathering Information Before Contacting Support 61
1.29 Managing Routers with Similar Configurations 62
1.30 Managing Redundant Routing Engines 66
1.31 Using the Second Routing Engine to Upgrade
to a New Software Version 70
2. Basic Router Security and Access Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
2.1 Allowing Access to the Router 76
2.2 Controlling Root Authentication 77
2.3 Logging In to the Router’s Console 79
2.4 Setting the Login Authentication Methods 80
2.5 Setting Up Login Accounts on the Router 81
2.6 Changing the Format of Plain-Text Passwords 84
2.7 Changing the Plain-Text Password Encryption Method 85
2.8 Creating a Login Account for Remote Authentication 86
2.9 Creating a Group Login Account 87
2.10 Customizing Account Privileges 89
2.11 Creating a Privilege Class that Hides Encrypted Passwords 95
2.12 Setting Up RADIUS User Authentication 96
2.13 Setting Up TACACS+ User Authentication 98
2.14 Restricting Inbound SSH and Telnet Access 98
2.15 Setting the Source Address for Telnet Connections 100
2.16 Creating a Login Banner 101
2.17 Finding Out Who Is Logged In to the Router 102
2.18 Logging Out of the Router 103
2.19 Forcibly Logging a User Out 104
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