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R1(config)#router ospf 20
R1(config-router)#area 1 virtual-link 10.30.30.30
R2(config)#router ospf 20
R2(config-router)#area 1 virtual-link 10.50.50.50
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In IP-based computer networks, Virtual Routing and Forwarding (VRF) is a technology that allows multiple instances of a routing table to co-exist within the same router at the same time. Because the routing instances are independent, the same or overlapping IP addresses can be used without conflicting with each other.
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Credits to Keith!
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First, the latest releases of switch software have adopted a new naming convention:
a)ipbase (Formerly SMI): Cisco IOS IP base image and device manager files. This image has Layer 2+ and basic Layer 3 routing (Static, RIP) features.
b)ipservices(Formerly EMI): Cisco IOS IP services image and device manager files. This image has Layer 2+ and full Layer 3 features.
c)ipbasek9: Cisco IOS IP base cryptographic image and device manager files. This image has the Kerberos, Secure Shell (SSH), Layer 2+, and basic Layer 3 routing features.
d)ipservicesk9: Cisco IOS IP services cryptographic image and device manager files. This image has the Kerberos, SSH, Layer 2+, and full Layer 3 features.
http://www.cisco.com/en/US/products/hw/ ... 98851.html
The 3560/3570 switches also have an advipservices image that supports a subset of IPv6.
http://www.cisco.com/en/US/products/hw/ ... 7459b.html
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https://supportforums.cisco.com/thread/143438
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Other solutions:
CBAC
Reflexive ACLs
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ip inspect command
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Alternative to Reflexive ACLs. Reflexive ACLs came out first.
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The outbound ACL does not count for the router generated traffic, its the fact.
An access list can control traffic arriving at the router or leaving the router, but not traffic originating at the router.
in the Cisco Doc link
http://www.cisco.com/en/US/docs/ios-xml ... CBC37727F9
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See command:
ip local policy route-map "route-map-name"
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ASA is a different ball game!. ASA firewall defaults to permit traffic originated in more secure interfaces to be responded by less secure interfaces.
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wic-adsl configuration with Verizon DSL. No username and password supplied by ISP. No PPPoE nor PPPoA used for connection.
https://supportforums.cisco.com/thread/2137389
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Configuration:
interface ATM0
no ip address
ip virtual-reassembly
no snmp trap link-status
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0.1 point-to-point
ip address dhcp
ip nat outside
ip virtual-reassembly
no snmp trap link-status
atm route-bridged ip
pvc 0/35
encapsulation aal5snap
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Frame Relay hub-n-spoke layout with 2 PVCs. Each PVC in different subnets. Demonstrates RIPv2, OSPF and EIGRP configurations.
PDF:
http://www.angelcool.net/tutorials/cisc ... SUBNET.pdf
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