Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] TCP (Transmission Control Protocol) ACLs header information TCP/IP (Transmission Control Protocol/Internet Protocol) application layer ARP proxy ARP data link layer host-to-host layer 2nd TCP 2nd UDP ICMP Echo Requests/Replies Internet layer physical layer three-way handshaking timers EIGRP, multicast flow timer holddown timers IGRP OSPF, group pacing timer RIP expiration timer route invalidation timers active time command timers basic command timing jitter TLA (Top Level Aggregator) TLV (Type/Length/Value) fields general fields IP External Routes TLV IP Internal Reachability, U/D bit IP Internal Routes TLV IP-specific fields of IS-IS LSPs Inter-Domain Routing Protocol Information Intermediate System Neighbors IP External Reachability IP Internal Reachability of IS-IS PDUs Area Addresses TLVs Authentication Information TLV Intermediate System Neighbors TLVs IP Interface Address TLV Padding TLV Protocols Supported TLV topological table, contents of totally stubby areas configuring 2nd trace command tracing failed routes IPv6 Traffic Class field (IPv6 packets) traffic, load balancing training classes for CCIE exam transit networks transition technologies triggered updates RIP troubleshooting EIGRP missing neighbors stuck-in-active neighbors IS-IS adjacencies link-state database 2nd on NBMA networks OSPF adjacencies area-wide problems isolated areas misconfigured summarization OSPFv3, Frame-Relay mapping RIP RIPng, misconfigured VLSM RIPv2, misconfigured VLSM static routes failed routes protocol conflicts 2nd subnet masks TTL (Time to Live) field Type 1 external paths Type 2 external paths types of LSAs ASBR Summary LSAs External Attributes LSAs Group Membership LSAs Network LSAs Network Summary LSAs NSSA External LSAs Opaque LSAs Router LSAs types of traffic in OSPF areas |