See PAT (Port Address
Translation)
Static NAT, 251, 256
troubleshooting translation tables, 262-263
verifying translations, 264-269
NAT-PT (Proxying and Translation) IPv6
integration methods, 284
NBMA (Nonbroadcast Multiaccess)
connectivity, Frame Relay networks,
329-330
NCP (Network Control Protocol), PPP, 318
neighbor adjacencies, OSPF
hello packets, 142-143
troubleshooting in, 161-163
neighbor relationships, troubleshooting in
EIGRP, 192-195
neighbor tables, EIGRP, 172
neighbors ?¬?eld (hello packets), 142
link-state routing
377
network command
EIGRP configuration, 174
OSPF, 144-145
troubleshooting
EIGRP neighbor relationships, 194
ospf neighbor adjacencies, 162
OSPF routing tables, 165
network ID (IP addresses), classful pre?¬?x
lengths, 123
network layer protocol phase (PPP), WAN,
319
network management traf?¬?c, 21
networks
autonomous systems
areas, 141
de?¬?ning, 99
IANA number assignments, 100
IGP routing, 100, 117
OSPF, 141
backbone areas, 118
converged networks, 106, 115
security
layer 2 security, 67
policy characteristics, 68
switches, 68-76
troubleshooting switches, 76-80
no access-list command
ACL configuration, 223
overloading inside global addresses, 259
no access-list name/number command, ACL
con?¬?guration, 222
no access-list pool command, dynamic inside
source IPv4 address translation, 256
no auto-summary command, disabling
EIGRP automatic summarization, 175
no ip access-group command, ACL
con?¬?guration, 223
no ip access-group name/number command,
ACL con?¬?guration, 222
no ip nat inside source command
dynamic inside source IPv4 address
translation, 256
overloading inside global addresses, 259
no ip nat inside source static command, static
inside source address translation, 255
no ip nat pool command, dynamic inside
source IPv4 address translation, 256
no switchport access vlan command, VLAN
port reassignment, 39
nonroot bridges, STP, 50
numbered ACL (Access Control Lists),
211-213, 238-239
numbered extended IPv4 ACL (Access
Control Lists), con?¬?guring, 227
command parameters table, 229
extended ACL with established parameters,
229-230
FTP denial from subnets, 231
Telnet denial from subnets, 232-233
well-known port numbers and IP protocols
table, 228
numbered standard IPv4 ACL (Access
Control Lists), con?¬?guring, 222
denying specific hosts example, 224
denying specific subnets example, 225-227
specific network permission example,
223-224
O
OSPF (Open Shortest Path First) protocol,
116
authentication, 156-159, 165-166
autonomous systems, 141
backbone areas, 141
configuring, 144-152
debug commands, 152-154
hierarchy of, 140
load balancing, 154-156
loopback interfaces, 145-146
LSA packets, 140
neighbor adjacencies
hello packets, 142-143
troubleshooting, 161-163
network command, 144-145
ospf auto-cost reference-bandwidth
command, 144
router functions in, 141
router ospf command, 144
SPF algorithm, 143-144
topological (link-state) databases, 140
troubleshooting, 160
neighbor adjacencies, 161-163
routing tables, 164-165
ospf auto-cost reference-bandwidth
command, 144
ospf auto-cost reference-bandwidth command
378
outbound ACL (Access Control Lists),
208-209
outside global addresses, NAT, 251
outside local addresses, NAT, 251
oversubscription ratios, redundant switchednetwork
topologies, 42-43
P
packets
controlling.
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