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The problem : What if we want to speak IPv6 but the whole path isn’t IPv6? Here is our topology let’s begin. IOSv1 and 2 are dual stacked, however the link between IOSv1 and IOSv2 is not IPv6. This link represents many routers. There’s always a chance that they don’t support IPv6 …
Continue reading “IPv6 Static Tunnel Over IPv4 Infrastructure”
Prefix-lists are typically used by router “features” to provide filtering. They “pass” permitted networks to a filtering feature which will actually do the filtering. They are used by distribute-lists, filter-lists, route-maps. Basics Some quick points which will guide you on understanding the basics. IP prefix list can match on sub netmask of route (ranges). They …
Continue reading “Understand Prefix-List Logic With Examples”
Here is our topology… R1 has a loopback of 1.1.1.1/32 R2 has 2.2.2.2/32 R3 has 3.3.3.3/32 R4 has 4.4.4.4/32 R4 has 9.9.9.9/32 R1 to R2 is 10.0.1.0/24 (area 1) R2 to R3 is 10.0.2.0/24 (area 0) R3 to R4 is 10.0.3.0/24 (area 2) R3 which is our ABR, has been configured …
Continue reading “Understanding a Totally Not-So-Stubby-Area in OSPF”
Link between IOSV1 and IOSV2 : 192.168.1.0/24 Link between IOSV2 and IOSV3: 192.168.2.0/24 Situation: We are running OSPF in our network. IOSV1 is hypothetically connect to an ISP router. Our ISP does not form an OSPF neighborship with us. That means that IOSV2 and IOSV3 can only reach the networks inside the OSPF routing domain. …
Continue reading “How to advertise a default route into OSPF”
Today I’m going to be talking about the possible ways we could manipulate paths in our EIGRP routing domain. Let’s take a look at our topology… R1 has two loopback interfaces. Loopback 1 – 10.0.1.1/24 Loopback 2 – 10.0.2.1/24 These will represent the networks we are trying to reach. The link between R1 and …
Continue reading “Different Ways to Manipulate an EIGRP path”
On IOSV1 we have two networks that we need to reach from IOSV4. 1.1.1.0/24 1.1.2.0/24 1.1.3.0/24 The link between IOSV2 and IOSV4 is 10.0.3.0/30 The link between IOSV3 and IOSV 4 is 10.0.4.0/30 The situation: Our company runs OSPF, and we just acquire d another company that runs EIGRP. We are keeping their topology and …
Continue reading “Path Manipulation via EIGRP and OSPF Redistribution”