Use of next-hop-self versus Advertising DMZ

The demilitarized zone (DMZ) defines a shared network between ASs. The IP subnet used forthe DMZ link might or might not be owned by any of the networked ASs. As you havealready seen, the next-hop address learned from the EBGP peer is preserved within IBGP. It isimportant for the IGP to be able to r...

Troubleshooting RIPv2 and RIPng

Two configuration problems common to RIPv2 are mismatched versions and misconfigured authentication. Both difficulties are easy to discover with debugging, as Example 6-29 shows. Example 6-29. Debugging reveals mismatched versions and misconfigured authentication. Jemez#debug ip rip events ...

Converging to a New STP Topology

STP logic monitors the normal ongoing Hello process when the network topology is stable; when the Hello process changes, STP then needs to react and converge to a new STP topology. When STP has a stable topology, the following occurs: 1. The root switch generates a Hello regularly based on the He...

MPLS Network Components

An MPLS-based network consists of routers and switches interconnected via transport facilities such as fiber links (see Figure 1-1). Customers connect to the backbone (core) network through multiservice edge (MSE) routers. The backbone comprises the core routers that provide high-speed transport and...

Vulnerabilities, Attacks, and Common Exploits

This section covers some of the vulnerabilities in TCP/IP and the tools used to exploit IP networks. TCP/IP is an open standard protocol, which means that both network administrators and intruders are aware of the TCP/IP architecture and vulnerabilities. Note There are a number of network v...

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