network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
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Sunday, September 30, 2012

ios crookbook...

over the years i've spent a wad of cash on network books and training materials.  most i still have, others have gotten away... in the last few months cisco has been offering ebooks at cisco press for a very reduced rate... i have bought quite a few, and while i used to prefer hard copy, i have come to appreciate the portability of pdf, especially the ease with which i can scrape important pieces into anki for long term study...

i bumped into ios cookbook a while back, and with your friendly neighborhood google, you can find what appears to be a bootleg  online... i think it's in china or some shit, and i don't really care... if it's online, feel free to use it i say, and let the publishers go after the crooks... that's not my concern, and i don't make any money from any of this anyway...

there are many sections in the so called cookbooks, and they cut directly to the chase for configurations purposes... this seems useful... i decided to go through it starting with the routing protocol sections as a structured practice...

i'll start with eigrp... this is meant for those who have already been through the theory of the major concerns presented in numerous ways by many more adept  than myself... as usual, i'll start at the beginning and follow through...

simple eigrp...


int lo0
ip add

int s2/0
ip add
clock rate 128000
no shut

router eigrp 1

no auto-summ


int lo0
ip add

int s2/0
ip add
clock rate 128000
no shut

router eigrp 1
no auto-summ

the code i have for the routers in gns3 uses no auto-summary by default... i will not be typing that again...

the router-id is selected using the same precedence as ospf... or you could manually configure it as well... wildcards can also be used in the network statements...

r2#sh ip eigrp topo
EIGRP-IPv4 Topology Table for AS(1)/ID(
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P, 1 successors, FD is 128256
        via Connected, Loopback0
P, 1 successors, FD is 2297856
        via (2297856/128256), Serial2/0
P, 1 successors, FD is 2169856
        via Connected, Serial2/0

r1#sh ip proto
*** IP Routing is NSF aware ***

Routing Protocol is "eigrp 1"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  EIGRP-IPv4 Protocol for AS(1)
    Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
    NSF-aware route hold timer is 240
    Topology : 0 (base)
      Active Timer: 3 min
      Distance: internal 90 external 170
      Maximum path: 4
      Maximum hopcount 100
      Maximum metric variance 1

  Automatic Summarization: disabled
  Maximum path: 4
  Routing for Networks:
  Routing Information Sources:
    Gateway         Distance      Last Update              90      00:03:24
  Distance: internal 90 external 170

note default k values 1 0 1 0 0...

r2#sh ip route eigrp
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set is subnetted, 1 subnets
D [90/2297856] via, 00:05:47, Serial2/0

r1#sh ip eigrp neigh
EIGRP-IPv4 Neighbors for AS(1)
H   Address                 Interface              Hold Uptime   SRTT   RTO  Q  Seq
                                                   (sec)         (ms)       Cnt Num
0                Se2/0                    11 00:19:23   13   100  0  7


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