Integrated IS-IS NBMA Design Solutions

Designing IS-IS networks across NBMA WANs is not as straightforward as designing other protocols, such as EIGRP, because IS-IS does not explicitly support NBMA. On the other hand, IS-IS over NBMA is not as complicated as OSPF either.  In the good old days, most organizations had a broadcast network (such as Ethernet) for the LAN and point-to-point links (such as serial links) for the WAN. Accommodating these different technologies when building a routing protocol made ..

IS-IS and Redistribution

A route whose source does not originate from the IS-IS domain is treated as an external route. Therefore, a separate TLV is defined for IP external ratability information. These external routes can be redistributed into both level 1 and level 2 as external routes.  Metrics for external routes can be redistributed, just as they can for both internal and external  metrics. In a tie-breaking situation, the internal is preferred over the external:  router IS-IS M..

A Brief History of WLANs

The value proposition of a network is that it ties together different entities and enables exchange of information. The network's value is also directly related to its size. The more entities that are connected and partake in the network, the higher the impact of the network is. For exchange and scaling to occur in a relevant and orderly manner, the connected entities must use the same language. As such, standards form an integral component of networks because they enforce or..

Setting the Source Address for Telnet

To configure a single common IP source address for all outbound Telnet session, use the following configuration command: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z.Router1(config)#ip telnet source-interface loopback0Router1(config)#endRouter1# You can also set the IP source address for individual outbound Telnet sessions on the command line: Router1#telnet 172.25.1.5 /source-interface loopback0 By default, the router uses the ..

Manually Configuring IPv6 Addresses on an Interface

You can configure an IPv6 unicast address on an interface by using a very similar process to how we set up IPv4 addresses in previous chapters of this book: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#ipv6 unicast-routing Router1(config)#interface FastEthernet0/0 Router1(config-if)#ipv6 address AAAA::1/64 Router1(config-if)#exit Router1(config)#end Router1# We can configure an IPv6 Anycast address by using ..