BSCI study examples

[lerdalt]

In going through my studies for BSCI (made 2 attempts already) and as I've been working further through it thought of something that I think would be beneficial and just haven't found a good example of anywhere yet.

1. EIGRP routing table and topology table. Would be nice to see a couple of screenshots on "how route to x.x.x.x looks in the topology table" followed with "how the same route looks in the routing table." Just seems a bit odd that in the books I've been referencing (ciscopress) and they don't really step through this very well.

2. OSPF area types. Again, not a good example of what the routing table would look like for a Stub area, Totally stubby area, and an NSSA.

Does anyone have some samples we could get posted out here?

Thanks
TL

 

[CiscoGuy33]

lerdalt,

Sorry - I do not have a screen shot but at the CCNP level you really should be working these on a real stack/lab so you can see for yourself what the routing table and topology tables would look like.

I know this is the only way I was able to pass the BSCI exam. I set up 5 2600s and 5 2500 routers and did EIGRP first and then setup OSPF - I was able to run all the "show" commands and see for myself what it looked like!

gwildfire has a link to his free rack - "Visit

http://www.Cisco-Engineer.com

for free Cisco rack access".

Just my $.02 - get some hands on!

I hope this helps!



E.A. Broda
CCNA, CCDA, CCAI, Network +

 

[lerdalt]

Thanks, I've been running through labs, but it just hit me that in the books some of the output is not clearly explained for the different network types nor the eigrp topology table.

I just ran through some labs and am working on putting together some examples to get posted.

Of course, I'm not wanting to discourage anyone from setting up their own lab and running each on their own, in fact I HIGHLY encourage it. But its still nice to get a side-by-side comparision.

One tip I have for anyone on setting up a lab with only a limited number of routers....use the loopbacks! Worked well for me to setup a multi-area ospf network. As well as with the EIGRP topology.

 

[techkiwi]

Yep, loopbacks are good for creating "pretend" networks to advertise.

Just one minor point to be aware of though is that OSPF will advertise loopback addresses as /32 even though you may have configured it as a /24. So it doesn't appear quite how you expect it to in the routing table

 

[Jsteve]

here is a quick post from a lab I am working on. If I come across an OSPF lab, I'll post it.

R12#sh ip route
Codes: 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

Gateway of last resort is not set

D 200.10.20.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
2.0.0.0/32 is subnetted, 1 subnets
D 2.2.2.2 [90/156160] via 132.1.26.2, 5d18h, FastEthernet0/0.26
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/2300416] via 132.1.26.2, 5d18h, FastEthernet0/0.26
64.0.0.0/24 is subnetted, 1 subnets
C 64.1.2.0 is directly connected, Serial1/3
D 200.10.17.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
5.0.0.0/32 is subnetted, 1 subnets
D 5.5.5.5 [90/2812416] via 132.1.26.2, 5d18h, FastEthernet0/0.26
D 200.10.16.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
6.0.0.0/32 is subnetted, 1 subnets
C 6.6.6.6 is directly connected, Loopback0
D 200.10.19.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
D 200.10.18.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
D 200.10.12.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
D 200.10.13.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3
D EX 192.10.5.0/24 [170/2686976] via 132.1.26.2, 5d18h, FastEthernet0/0.26
D 200.10.14.0/24 [90/2297856] via 64.1.2.254, 5d18h, Serial1/3

R12#sh ip route 192.10.5.0
Routing entry for 192.10.5.0/24
Known via "eigrp 10", distance 170, metric 2686976, type external
Redistributing via eigrp 10
Last update from 132.1.26.2 on FastEthernet0/0.26, 5d18h ago
Routing Descriptor Blocks:
* 132.1.26.2, from 132.1.26.2, 5d18h ago, via FastEthernet0/0.26
Route metric is 2686976, traffic share count is 1
Total delay is 40200 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 3
R12#sh ip route 200.10.14.0
Routing entry for 200.10.14.0/24
Known via "eigrp 10", distance 90, metric 2297856, type internal
Redistributing via eigrp 10
Last update from 64.1.2.254 on Serial1/3, 5d18h ago
Routing Descriptor Blocks:
* 64.1.2.254, from 64.1.2.254, 5d18h ago, via Serial1/3
Route metric is 2297856, traffic share count is 1
Total delay is 25000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1

R12#sh ip eigrp top 192.10.5.0
IP-EIGRP (AS 10): Topology entry for 192.10.5.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2686976
Routing Descriptor Blocks:
132.1.26.2 (FastEthernet0/0.26), from 132.1.26.2, Send flag is 0x0
Composite metric is (2686976/2684416), Route is External
Vector metric:
Minimum bandwidth is 1544 Kbit
Total delay is 40200 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 3
External data:
Originating router is 5.5.5.5
AS number of route is 0
External protocol is Connected, external metric is 0
Administrator tag is 0 (0x00000000)

R12#sh ip eigrp top 200.10.14.0
IP-EIGRP (AS 10): Topology entry for 200.10.14.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2297856
Routing Descriptor Blocks:
64.1.2.254 (Serial1/3), from 64.1.2.254, Send flag is 0x0
Composite metric is (2297856/128256), Route is Internal
Vector metric:
Minimum bandwidth is 1544 Kbit
Total delay is 25000 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1

 

[lerdalt]

With the loopbacks I was really using them to show additional routes in the routing table so I could see something 'vanish' as I moved from stub, to totally stubby, to NSSA, to NSSA totally stubby. Even though it was still an internal route, it was something quick and easy to watch.

Thanks everyone.