CCNA Routing and Switching
HuPe306583u
HuPe306583u
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906 roles<br />
STP, 57<br />
root. See RPs<br />
RSTP, 60, 91-92<br />
root bridge IDs, 50<br />
root costs (switches), 48<br />
root ports. See RPs<br />
root switches<br />
electing, 50-52<br />
election influence, configuring, 80-81<br />
ruling out switches, 100-101<br />
STP, verification, 77<br />
troubleshooting, 99-101<br />
round robin scheduling (queuing), 505<br />
round-trip delay, 491<br />
Round Trip Time (RTT), 715<br />
routable protocols, 172<br />
routed ports, 534-537<br />
routed protocols, 172<br />
Router Advertisement (RA) messages,<br />
610, 684<br />
router bgp comm<strong>and</strong>, 311<br />
router eigrp comm<strong>and</strong>, 246, 270, 647<br />
router-id comm<strong>and</strong>, 222, 614<br />
OSPFv3, 624, 643<br />
RIDs, defining, 196<br />
router-on-a-stick. See ROAS<br />
router ospf comm<strong>and</strong>, 196, 222<br />
router ospf 1 comm<strong>and</strong>, 198<br />
Router Solicitation (RS), 610<br />
routers. See also routes; routing<br />
ABR (Area Border Router), 190<br />
interface OSPF areas, verifying,<br />
210-211<br />
OSPFv2 multiarea configuration,<br />
209-210<br />
advertisement (RA) messages, 610, 684<br />
backbone, 190<br />
best routes, finding, 180<br />
classification, 497<br />
ACLs, 497<br />
NBAR, 498<br />
Cloud Services Routers (CSRs), 747<br />
configuring different VIPs,<br />
troubleshooting, 563<br />
data plane processing, 763<br />
designated (DRs), 185<br />
backup (BDRs), 185<br />
discovering, 211-212<br />
Ethernet links, 185-186<br />
DROthers, 186<br />
flooding, 179<br />
GRE tunnels between, 399<br />
HSRP<br />
active/passive model, 551<br />
active/st<strong>and</strong>by routers, choosing,<br />
555<br />
active/st<strong>and</strong>by rules, 557<br />
configuring, 554<br />
failover, 552<br />
group numbers, 555<br />
load balancing, 553<br />
no preemption, 557<br />
with preemption, 558<br />
troubleshooting, 560-563<br />
verifying, 555-556<br />
versions, 559-560<br />
IDs. See RIDs<br />
internal, 190, 623-624<br />
IPv6<br />
addressing configuration,<br />
598-599<br />
connectivity, verifying, 601-603<br />
issues, 604<br />
routing, enabling, 598
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