Basic Network Device Commands and Setup

These are very basic network commands and setup instructions for the Ansible Network Automation labs. I am keeping those here for quick reference in case I am in trouble with a quick lab setup in GNS3. Use at your own risk (!)

• Cisco Set Password
• Add a user for remote access
• Cisco NX9000 Initial Config
• Cisco NXOS vrf
• Cisco Set IP Address
• Cisco ASA Name interface and change security level
• Cisco General Commands
• Get DHCP IP for VPC Node
• Enable SSH on HPE Comware7 Devices
• Assign IP Address
• Enable SSH/tty and login on Cisco Devices
• Setting Up SSH and Local Authentication on Cisco ASA
• Cisco ASA check Ciphers
• Configure routes
• SSH Ciphers
• Enabled Terminal monitoring
• Enable Clipboard copy in XTerm

Cisco Set Password

conf t
## change admin password
username admin password <securepassword> priv 15

## To change the enable password
enable password <securepassword>

Add a user for remote access

configure terminal
username user1 password mypassword
                                # create a user with password
username user1 privilege 15 
                                # configure privilege     
enable password mypassword
                                # setting enable password                         
## Sample
username cisco password C!sco123

username cisco privilege 15
## or 
username cisco role priv-15

enable password C!sco123
## or
feature privilege
enable secret 0 admin priv-lvl 15

Cisco NX9000 Initial Config

The following configuration will be applied:
  password strength-check
  switchname NX9K
vrf context management
ip route 0.0.0.0/0 192.168.57.1
exit
  feature telnet
  ssh key rsa 1024 force
  feature ssh
  system default switchport
  no system default switchport shutdown
  copp profile strict
interface mgmt0
ip address 192.168.57.122 255.255.255.0
no shutdown

Cisco NXOS vrf

NX9K(config)# ping 192.168.57.106 vrf management
PING 192.168.57.106 (192.168.57.106): 56 data bytes
64 bytes from 192.168.57.106: icmp_seq=0 ttl=63 time=2.202 ms
64 bytes from 192.168.57.106: icmp_seq=1 ttl=63 time=3.035 ms
64 bytes from 192.168.57.106: icmp_seq=2 ttl=63 time=2.545 ms
64 bytes from 192.168.57.106: icmp_seq=3 ttl=63 time=3.184 ms
64 bytes from 192.168.57.106: icmp_seq=4 ttl=63 time=4.323 ms

--- 192.168.57.106 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss

## Copy to tftp
NX9K(config)# copy running-config tftp://192.168.57.106/test-con vrf management
Trying to connect to tftp server......
Connection to Server Established.
                                                                          TFTP put operation was successful
Copy complete, now saving to disk (please wait)...
Copy complete.

Cisco Set IP Address

R1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#int f0/0                           
R1(config-if)#ip address 10.1.1.100 255.255.255.0

R1(config-if)#int loop 0                         
R1(config-if)#ip address 1.1.1.1 255.255.255.0   

R1(config)#int f0/0
R1(config-if)#no shut

Cisco ASA Series General Operations CLI Configuration Guide, 9.8

Cisco ASA Name interface and change security level

## The nameif command is used to specify a name for the interface
nameif inside

## Change security level
security 90

Cisco General Commands

sh ver                             # show version
sh int ip br                       # show interface IP details

Get DHCP IP for VPC Node

PC1> ip dhcp
DORA IP 192.168.122.205/24 GW 192.168.122.1

Enable SSH on HPE Comware7 Devices

Assign IP Address

Enable SSH/tty and login on Cisco Devices

(config)# line vty 0 4
(config-line)# transport input all
(config-line)# login local

(config)# ip domain-name mydomain.com
(config)# crypto key generate rsa

# enable ssh v2
(config)# ip ssh version 2 

Setting Up SSH and Local Authentication on Cisco ASA

Check blog

## Step 1: Configure aaa to use local database for ssh and console
ciscoasa# aaa authentication ssh console LOCAL

## Step 2: Create admin username with privilege 15 (username, P@ssw0rd)
ciscoasa# username username password P@ssw0rd priv 15

## Step 3: Turn on password for enable
ciscoasa# aaa authentication enable console LOCAL

## Step 4: Turn on serial console authentication
ciscoasa# aaa authentication serial console LOCAL

## Step 5: Save the changes so far
ciscoasa# write mem

## Step 6: log out console and verify access
ciscoasa(config)# end
ciscoasa# exit
Logoff
Username: username
Password: ********

## Step 7: Generate ssh key pair
ciscoasa# crypto key generate rsa modulus 4096
INFO: The name for the keys will be: <Default-RSA-Key>
Keypair generation process begin. Please wait…
ciscoasa(config)#***NOTE*** SSH is an encrypted protocol, uses RSA to generate public and private key
4096 = block size
rsa = encryption algorithm
Step 8: Allow access to the inside interface
ciscoasa# ssh 0.0.0.0 0.0.0.0 inside

## Step 9: Force ssh version 2
ciscoasa# ssh version 2

## Step 10: Add timeout of 15 min to ssh
ciscoasa# ssh timeout 15

Cisco ASA check Ciphers

show ssl ciphers all

## Change the group1-sha1 to group14-sha1 in Cisco ASA 5506X (9.8(2))
## Use only SSH v2 and change to use dh-group14-sha1

ssh version 2
ssh key-exchange group dh-group14-sha1

## login to ASA which offer only diffie-hellman-group1-sha1
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -l <username> <ip_address>

• Cisco ASA Firewall – Diffie-Hellman-Group1-Sha1

Configure routes

R1(config)#router ospf 1
R1(config-router)#network 0.0.0.0 255.255.255.255 area 0

R2#sh ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
1.1.1.1           1   FULL/DR         00:00:34    10.1.1.101      FastEthernet0/0

R2#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
O       1.1.1.1 [110/11] via 10.1.1.101, 00:01:06, FastEthernet0/0
     2.0.0.0/32 is subnetted, 1 subnets
C       2.2.2.2 is directly connected, Loopback0
     10.0.0.0/24 is subnetted, 1 subnets
C       10.1.1.0 is directly connected, FastEthernet0/0

SSH Ciphers

ssh -Q cipher       # List supported ciphers
ssh -Q mac          # List supported MACs
ssh -Q key          # List supported public key types
ssh -Q kex          # List supported key exchange algorithms

Enabled Terminal monitoring

ter mon

Enable Clipboard copy in XTerm

## Add to the file ~/.Xresources (or create):
XTerm*selectToClipboard: true

## Then run the command:
xrdb -merge ~/.Xresources

## Restart xterm.