Cisco 1841Version 12.4(25f) When to distribute the default gateway of this router to other routing devices with OSPF: ! router ospf 1 router-id 0.0.0.1 log-adjacency-changes network 192.168.11.0 0.0.0.255 area 0.0.0.0 network 192.168.12.0 0.0.0.255 area 0.0.0.0 network 192.168.13.0 0.0.0.255 area 0.0.0.0 network 192.168.14.0 0.0.0.255 area 0.0.0.0 default-information originate !
Category: Cisco
Enable SSH
Example to enable SSH. configure terminal ip domain name network.lan crypto key generate rsa general-keys modulus 2048 ip ssh version 2 end configure terminal line vty 0 15 login local transport input telnet ssh end configure terminal service password-encryption enable password 0 PassWord username UserName privilege 15 password 0 PassWord end wr
Tunnel and OSPF
Here an example of 1 corporate router with connections to 3 branche routers. Each connection is with a serial interface. The routing is done with OSPF.The example is created with Cisco Packet Tracer. Partial running-config of CORP CORP# ! OUTPUT OMITTED ! interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface Tunnel0 ip address 10.0.10.1 255.255.255.252 […]
Cisco CLI
aaa authentication line default methode1 methode2 aaa authentication login default aaa new model clear ip ospf proces default-information originate “interface sub-command: bandwidth speed” “interface sub-command: ip mtu xxx ip ospf cost x ipv6 mtu xxx” ip address negotiated ip host Server 172.16.20.254 ipv6 access-list Block_Telnet ipv6 host Server1 2001:db8:3c4d:1:a14c:8c3:2d1:be3d “OSPF sub-command: auto-cost reference-bandwidth speed router-id […]
Cisco command: show (3)
show access-lists show cdp show cdp interface show cdp neighbors show cdp neighbors detail show cdp traffic show host show interace fa0/0 show interfaces show interfaces fastEthernet 0/15 switchport show interfaces trunk show ip bgp show ip bgp neighbors show ip bgp summary show ip default-gateway show ip eigrp events show ip eigrp interfaces show […]
Port-channel
An example of port-channel with 3 switches. Partial config of switch SW1: interface Port-channel1 switchport trunk encapsulation dot1q switchport mode trunk ! interface Port-channel2 switchport trunk encapsulation dot1q switchport mode trunk ! interface GigabitEthernet0/0 switchport trunk encapsulation dot1q switchport mode trunk media-type rj45 negotiation auto channel-group 1 mode active ! interface GigabitEthernet0/1 switchport trunk encapsulation […]
Cisco command: show (2)
Some show commands which might come in handy. EIGRP show ip protocols show ip eigrp neighbors show ip eigrp topology show ip route eigrp show ip eigrp topology all-links show ip eigrp interface show ipv6 protocols show ipv6 eigrp neighbors show ipv6 route eigrp show ipv6 eigrp interface CDP show cdp show cdp neighbors show […]
Tunnel mode gre ip
Configuring a tunnel between 2 Cisco 2811 routers, done in Cisco Packet Tracer. Partial config of RouterA RouterA#show running-config ! ! interface Tunnel0 ip address 192.168.10.1 255.255.255.0 mtu 1476 tunnel source Serial1/0 tunnel destination 63.1.1.2 ! ! interface FastEthernet0/0 ip address 10.0.10.1 255.255.255.0 duplex auto speed auto ! interface Serial1/0 ip address 63.1.1.1 255.255.255.252 clock […]
Cisco command: show (1)
Router#show ip eigrp topology Router#show ip eigrp topology IP-EIGRP Topology Table for AS 100/ID(192.168.1.1) Codes: P – Passive, A – Active, U – Update, Q – Query, R – Reply, r – Reply status P 10.1.1.0/24, 1 successors, FD is 28160 via Connected, FastEthernet0/0 P 10.2.2.0/24, 1 successors, FD is 20514560 via 192.168.1.2 (20514560/28160), Serial1/0 […]
ICND2 – Abbreviations
802.3 Ethernet AAA Authentication Authorization Accounting ABR Area Border Router ACL Access Control List AD Advertised Distance AD Administrative Distance AF Assured Forwarding API Application Programming Interface APIC Cisco Application Policy Infrastructure Controller APIC-EM Application Policy Infrastructure Controller – Enterprise Module ARP Address Resolution Protocol AS Autonomous System ASBR Autonomouse System Boundary Router ASN Autonomous […]