See route summarization
route poisoning
poison reverses, 110, 113
preventing routing loops, 109-110
route summarization
EIGRP, 172
con?¬?rming automatic summarization,
198
disabling automatic summarization,
175
VLSM, 128-132
routed protocols, overview of, 99
Router con?¬?guration mode (IOS Software), 5
router ID, hello packets, 142
router ospf command, 144
router priority, hello packets, 143
routers
inter-VLAN routing, 64-66
IPv6 configuration, 287
limiting access via ACL, 227
OSPF functions, 141
routing
by rumor, 103
classless routing, EIGRP, 172
defining, 97
dynamic routing, 98-100
IPv6 addresses, 282
link-state routing
OSPF, 139
topological databases, 140
loops, 105
converged networks, 106
counts-to-in?¬?nity, 107
preventing via route poisoning,
109-110
preventing via split horizons, 109
troubleshooting via maximum metric
settings, 108
review of, 122
static routing, 98
routing protocols
administrative distance, 101-103
EGP (Exterior Gateway Protocols), 99
IGP (Interior Gateway Protocols), 99-100
advanced distance vector routing, 100,
122
distance vector routing, 100, 103-115
link-state routing, 100, 115-122
metrics, 101
multiple routes, 101
overview of, 99
routing tables
EIGRP, troubleshooting in, 195-198
OSPF, troubleshooting in, 164-165
RSA (Rivest, Shamir, and Adleman)
algorithm, IPsec, 311
RSA signatures, IPsec, 312
RSTP (Rapid Spanning Tree Protocol), 58-59
port roles, 60
port states, 60-61
verifying configuration of, 87
S
scavenger class traf?¬?c, 21
security
authentication
EIGRP, 185-191, 198-199
OSPF, 156-159, 165-166
Catalyst switch ports, 71-73
IPsec, 307
antireplay protection, 308
authentication, 308, 312
con?¬?dentiality (encryption), 308
data encryption, 309-311
data integrity, 308, 311-312
framework protocols, 313
switches, 76
802.
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