Discussion

snd_una parameter (TCB), 438
snd_wnd parameter (TCB), 438
sndcc parameter (TCB), 438
SNMP (Simple Network Management
Protocol)
access control, 137, 138, 140, 141
configuring, 133–134, 153–155
firewall filters, 99, 138–140, 296, 321
hardware inventory, 142–144
IP routing, 248
logging access, 147, 148
logging enterprise-specific traps, 148, 149
management interface, 213
management model, 130
MIBs, 130–133
monitoring router temperature, 149–153
OIDs, 130–133
overview, 129, 130
prefix lists, 292
protecting Routing Engines, 327–329
router operational information, 145–146
security and, 133
setting router information, 135, 136
setting up traps, 136, 137, 139, 157–160
software inventory information, 141, 142
source address and, 101
tracing and, 179
tracking configuration changes, 156–157
snmp mib get command, 144
snmp permission bit, 90
SNMP Set capability, 73
SNMP_ prefix, 164
snmp-control permission bit, 90
snmpd process (SNMP), 57, 130, 147
snmpget command, 144
snmpgetnext command, 144
snmpwalk command, 135, 141, 144
soft-preemption, 506
soft-preemption cleanup, 506
software releases
installing on J-series routers, 51, 52
installing on M-series routers, 49–51
installing on T-series routers, 49–51
software versions
determining, 54–58
extracting information, 141, 142
graceful switchover and, 69
Routing Engines and, 70, 71
show chassis hardware command, 61
SONET (Synchronous Optical Network)
configuring interfaces, 232–236
MPLS and, 505
OSPF and, 408, 410
protecting against circuit
failures, 236–238
resources and, 526
sonet-alarms keyword, 137
source addresses
firewall filters for, 77
IP routing and, 246
primary and preferred, 210–212
RIP and, 335
setting, 204–206
spoofing, 267
Telnet connections, 100, 101
verifying, 266
source filtering, 197, 219
source-address match term, 304
source-port match term, 305
source-prefix-list match term, 305
Source-Specific Multicast (SSM), 577,
605–607
spaces, 82, 174
spamming, blackholing routes and, 265
sparse protocols, 578
SPF (shortest-path first) algorithm
ABRs and, 383
convergence times and, 409
CSPF and, 485
IS-IS convergence times, 376
leaking IS-IS Level 2 routes, 372
link-state databases and, 357, 390
OSPF and, 382, 388, 416
purpose, 349
SPI (security parameter index), 107, 109
split horizon technique, 332, 333
spoofing, address, 266
SPT (shortest path tree), 577
SSB (System and Switch Board), 146
SSH (secure shell)
copying software to router, 50
copying software to routers, 49
disabling for root user, 78
file copy command and, 29
firewall filters and, 139, 302–304, 308,
321, 323
management interface, 213
password encryption, 75
protecting Routing Engines, 327–329
restricting inbound access, 98, 100
root authentication and, 77, 78
router configuration, 16
router keys, 44
router security and, 73, 76
Index | 653
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