This topic is to discuss the following lesson:
Rene,
Hi. Great explanations as always. One quick clarification - in the offset list example towards the end of the network lesson you show applying the offset list to the F0/1 interface. of R2. I assume that you must also apply it to the F0/0 as well (like you did in the example following using distribute-lists)?
Many thanks,
Thomas
Hi Thomas,
Glad to hear you like it! In my example, R4 was advertising the route with the lower better but it could also been R3 (depends on which router converges first) so yes, you should also apply the offset-list to the interface facing R2.
R3 and R4 can never advertise anything useful about network 1.1.1.0 /24 to R2 so we should ignore anything they send.
Rene
Hi
I was creating this topology in GNS 3 (version 3.10) . The routers I am using are C-3725 .
When I configure the fa interfaces between R1 and R2 . I get the following message “IP addresses may not be configured on L2 links”.
Could some one guide me where I am going wrong.
Â
Thank You
romesh
Hi Romesh,
You probably “inserted” the switch module in the router instead of the routed interfaces.
The interfaces on the switch module are always L2, routed interfaces are L3. Try one of the other interfaces in the slots and it should work.
Rene
Dear Rene,
Referring to your “R2 has learned about network 1.1.1.0 /24 from R1 with a hop count of 6. I used an offset-list on R1 to increase the hop count for this topology, I’ll show you why in a bit.,”
Can you please help showing how to set hop count up to 6?
I have tried the following:
R2(config)#router rip
R2(config-router)#offset-list LOOPBACK_R1 in 6 fa0/0
but the hop count is still one from R2 result.
Â
Thanks.
Makara NGY
Hi Rene, there is actually something even deeper to this that you may not have realised. Let’s say the network is stuck in the loop currently, and R2’s best path is via R4 to reach 1.1.1.0/24. Okay? So since R4 told R2 this is the best path via RIP, this ALSO means that since RIP is distance vector, it means split-horizon would then suppress advertisements of 1.1.1.0/24 from R2 towards R4. So EVEN IF you change the AD on R4, once the loop is active, lowering the AD of RIP or increasing the AD of OSPF external routes should not affect anything. Since R4’s RIP database won’t even have a route to 1.1.1.0/24 inside of it, the only path to 1.1.1.0/24 is via R3. So how would you handle this in the lab exam, if you are stuck in this scenario & can’t make the AD adjustments actually work? Just ran into this a moment ago in a lab 
And I even turned split-horizon off to try make it work, but it actually didn’t work lol.
Hi Stephen,
The “core” of this problem is that R2 is learning the 1.1.1.0/24 route through R4, something that should never happen since it’s a route that went from RIP > OSPF > RIP. We call it a metric redistribution issue since RIP doesn’t have any way to differentiate between an internal or external route…the lower metric from R4 wins. This really is a routing loop which is bad
Once R2 installs the route through R4, it will no longer advertise 1.1.1.0/24 to R4 so the only way for R4 to get to 1.1.1.0/24 is R3…keep in mind that this is not much of an issue…it’s sub-optimal routing but not a routing loop 
The only way to fix this sub-optimal routing problem so that R4 uses R2 as the next hop is to make sure that:
* R2 is able to advertise 1.1.1.0/24 to R4.
* R4 doesn’t install an OSPF route for 1.1.1.0/24.
You can achieve this with redistribution filtering or offset-lists.
Hi Renee and Andrew,
Kinda confused, in the beginning you started off by saying “In this lesson we’ll take a look at metric based redistribution problems and how to fix them.”, but the illustration is all about using Administrative Distance (AD) to fix redistribution problems. I thought metric, for example, is defined as cost for OSPF and K values for EIGRP while AD is the reliability factor for example, 90 for EIGRP and 110 for OSPF. They are not the same, are they? Can these two terms be used interchangeably?
Respectfully,
Syed
Hi Rene,
Please disregard my above post / question. After reviewing it carefully, i noticed it’s all about metric, not AD. It’s my bad!
Sry for taking your time.
Respectfully,
Syed
1 Like
u r the best 
well explained i swear to GOD
1 Like
Great document! Thanks Rene!
Hi Rene,
In the real world where most companies don’t use RIP, could there potential be routing loops if we only use OSPF?, where I work our core runs on OSPF
regards
WN
Hi Walter,
With OSPF, it’s less likely to happen because OSPF considers the path type to decide what route to use:
If you run a single OSPF process, you don’t have to worry about this. Technically, whenever you redistribute a route from routing protocol X into Y and back into X, you could face issues.
With OSPF, imagine you have an E1 route in OSPF process 1 that you redistribute into another routing protocol (or another OSPF process) and back into OSPF process 1.
OSPF process 1 now has to choose between its original E1 route or the redistributed one. They are both E1, so it’s the metric that will be the decision-maker.
This is something you could encounter in a CCIE lab.
Rene
Hi Rene,
can you provide me the answer for Expert Redistribution 2 scenario.
it will making me confusing.
Hello Gowthamraj
Can you tell us what you have done so far? In the configuration process, where are you stuck? Let us know more specifically so that we can help you with that particular issue.
Laz
Hi Lagapides,
Thank you for your reply. actually day before yesterday i tried that lab at 1 stage got totally confused & i did not saved that config. Again today i tried that lab i hope completed scenario as per the lab instructions. just want to cross verify as per the Rene lab.
please verify the config and output ,if i made any mistakes please let me known .
R1#show run
Building configuration...
Current configuration : 1819 bytes
!
! Last configuration change at 21:53:19 UTC Wed Nov 11 2020
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface Loopback1
ip address 1.1.1.1 255.255.255.255
!
!
interface FastEthernet0/0
ip address 192.168.12.1 255.255.255.0
duplex half
!
!
interface FastEthernet1/0
ip address 192.168.14.1 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet1/1
no ip address
shutdown
duplex auto
speed auto
!
!
interface FastEthernet2/0
ip address 192.168.13.1 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet2/1
no ip address
shutdown
duplex auto
speed auto
!
!
router ospf 1
log-adjacency-changes
redistribute rip subnets
network 1.1.1.1 0.0.0.0 area 0
network 192.168.13.0 0.0.0.255 area 0
network 192.168.14.0 0.0.0.255 area 0
distribute-list 2 in FastEthernet1/0
distance 121 0.0.0.0 255.255.255.255 1
!
router rip
version 2
redistribute ospf 1 metric 1
network 192.168.12.0
no auto-summary
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
access-list 1 permit 2.2.2.2
access-list 2 deny 3.3.3.3
access-list 2 permit any
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
shutdown
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line vty 0 4
login
!
end
R1#show ip route
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, + - replicated route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback1
2.0.0.0/32 is subnetted, 1 subnets
R 2.2.2.2 [120/1] via 192.168.12.2, 00:00:23, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
O E2 3.3.3.3 [110/20] via 192.168.13.3, 00:03:24, FastEthernet2/0
4.0.0.0/32 is subnetted, 1 subnets
O E2 4.4.4.4 [110/1] via 192.168.14.4, 00:03:24, FastEthernet1/0
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, FastEthernet0/0
L 192.168.12.1/32 is directly connected, FastEthernet0/0
192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.13.0/24 is directly connected, FastEthernet2/0
L 192.168.13.1/32 is directly connected, FastEthernet2/0
192.168.14.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.14.0/24 is directly connected, FastEthernet1/0
L 192.168.14.1/32 is directly connected, FastEthernet1/0
O E2 192.168.23.0/24 [110/20] via 192.168.14.4, 00:03:25, FastEthernet1/0
[110/20] via 192.168.13.3, 00:03:25, FastEthernet2/0
O E2 192.168.24.0/24 [110/1] via 192.168.14.4, 00:03:25, FastEthernet1/0
O E2 192.168.34.0/24 [110/1] via 192.168.14.4, 00:03:25, FastEthernet1/0
Output:
-------
R1#traceroute 2.2.2.2 source 1.1.1.1
Type escape sequence to abort.
Tracing the route to 2.2.2.2
1 192.168.12.2 4 msec 4 msec 8 msec
R1#traceroute 3.3.3.3 source 1.1.1.1
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 192.168.13.3 32 msec 16 msec 20 msec
R1#trac
R1#traceroute 4.4.4.4 sou
R1#traceroute 4.4.4.4 source 1.1.1.1
Type escape sequence to abort.
Tracing the route to 4.4.4.4
1 192.168.14.4 12 msec 16 msec 24 msec
R1#
R2:
----
R2#show run
Building configuration...
Current configuration : 1741 bytes
!
! Last configuration change at 20:19:47 UTC Wed Nov 11 2020
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface Loopback1
ip address 2.2.2.2 255.255.255.255
!
!
interface FastEthernet0/0
ip address 192.168.12.2 255.255.255.0
duplex half
!
!
interface FastEthernet1/0
ip address 192.168.23.2 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet1/1
no ip address
shutdown
duplex auto
speed auto
!
!
interface FastEthernet2/0
ip address 192.168.24.2 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet2/1
no ip address
shutdown
duplex auto
speed auto
!
!
!
router eigrp 1
network 192.168.23.0
redistribute rip metric 1500 100 255 100 1500
!
router rip
version 2
redistribute eigrp 1 metric 1
offset-list 2 in 5 FastEthernet0/0
offset-list 1 in 5 FastEthernet2/0
network 2.0.0.0
network 192.168.12.0
network 192.168.24.0
no auto-summary
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
access-list 1 permit 1.1.1.1
access-list 2 permit 4.4.4.4
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
shutdown
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line vty 0 4
login
!
end
R2#show ip route
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, + - replicated route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
R 1.1.1.1 [120/1] via 192.168.12.1, 00:00:04, FastEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback1
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/156160] via 192.168.23.3, 01:21:04, FastEthernet1/0
4.0.0.0/32 is subnetted, 1 subnets
R 4.4.4.4 [120/1] via 192.168.24.4, 00:00:22, FastEthernet2/0
192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.12.0/24 is directly connected, FastEthernet0/0
L 192.168.12.2/32 is directly connected, FastEthernet0/0
R 192.168.13.0/24 [120/1] via 192.168.24.4, 00:00:22, FastEthernet2/0
[120/1] via 192.168.12.1, 00:00:04, FastEthernet0/0
R 192.168.14.0/24 [120/1] via 192.168.24.4, 00:00:22, FastEthernet2/0
[120/1] via 192.168.12.1, 00:00:04, FastEthernet0/0
192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.23.0/24 is directly connected, FastEthernet1/0
L 192.168.23.2/32 is directly connected, FastEthernet1/0
192.168.24.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.24.0/24 is directly connected, FastEthernet2/0
L 192.168.24.2/32 is directly connected, FastEthernet2/0
D 192.168.34.0/24 [90/30720] via 192.168.23.3, 01:21:04, FastEthernet1/0
R2#
Output:
R2#traceroute 1.1.1.1 source 2.2.2.2
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.12.1 20 msec 20 msec 20 msec
R2#trac
R2#traceroute 3.3.3.3 sou
R2#traceroute 3.3.3.3 source 2.2.2.2
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 192.168.23.3 8 msec 12 msec 12 msec
R2#trac
R2#traceroute 4.4.4.4 sou
R2#traceroute 4.4.4.4 source 2.2.2.2
Type escape sequence to abort.
Tracing the route to 4.4.4.4
1 192.168.24.4 12 msec 12 msec 24 msec
R2#
R3:
---
R3#show run
Building configuration...
Current configuration : 1724 bytes
!
! Last configuration change at 21:16:09 UTC Wed Nov 11 2020
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface Loopback1
ip address 3.3.3.3 255.255.255.255
!
!
interface FastEthernet0/0
ip address 192.168.34.3 255.255.255.0
duplex half
!
!
interface FastEthernet1/0
ip address 192.168.23.3 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet1/1
no ip address
shutdown
duplex auto
speed auto
!
!
interface FastEthernet2/0
ip address 192.168.13.3 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet2/1
no ip address
shutdown
duplex auto
speed auto
!
!
!
router eigrp 1
network 3.0.0.0
network 192.168.23.0
network 192.168.34.0
redistribute ospf 3 metric 1500 100 255 100 1500
offset-list 1 in 100 FastEthernet1/0
!
router ospf 3
log-adjacency-changes
redistribute eigrp 1 subnets
network 192.168.13.0 0.0.0.255 area 0
distance ospf external 171
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
access-list 1 permit 4.4.4.4
no cdp log mismatch duplex
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
shutdown
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line vty 0 4
login
!
end
R3#show ip route
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, + - replicated route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.13.1, 00:15:04, FastEthernet2/0
2.0.0.0/32 is subnetted, 1 subnets
D EX 2.2.2.2 [170/1734656] via 192.168.23.2, 01:15:42, FastEthernet1/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback1
4.0.0.0/32 is subnetted, 1 subnets
D EX 4.4.4.4 [170/1734656] via 192.168.34.4, 01:15:42, FastEthernet0/0
D EX 192.168.12.0/24
[170/1734656] via 192.168.23.2, 01:15:42, FastEthernet1/0
192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.13.0/24 is directly connected, FastEthernet2/0
L 192.168.13.3/32 is directly connected, FastEthernet2/0
O 192.168.14.0/24 [110/2] via 192.168.13.1, 00:15:04, FastEthernet2/0
192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.23.0/24 is directly connected, FastEthernet1/0
L 192.168.23.3/32 is directly connected, FastEthernet1/0
D EX 192.168.24.0/24
[170/1734656] via 192.168.34.4, 01:15:42, FastEthernet0/0
[170/1734656] via 192.168.23.2, 01:15:42, FastEthernet1/0
192.168.34.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.34.0/24 is directly connected, FastEthernet0/0
L 192.168.34.3/32 is directly connected, FastEthernet0/0
R3#
output:
R3#traceroute 1.1.1.1 source 3.3.3.3
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.13.1 12 msec 20 msec 16 msec
R3#trac
R3#traceroute 2.2.2.2 sou
R3#traceroute 2.2.2.2 source 3.3.3.3
Type escape sequence to abort.
Tracing the route to 2.2.2.2
1 192.168.23.2 8 msec 8 msec 12 msec
R3#trac
R3#traceroute 4.4.4.4 sou
R3#traceroute 4.4.4.4 source 3.3.3.3
Type escape sequence to abort.
Tracing the route to 4.4.4.4
1 192.168.34.4 0 msec 8 msec 16 msec
R3#
R4:
---
R4#show run
Building configuration...
Current configuration : 2010 bytes
!
! Last configuration change at 20:34:05 UTC Wed Nov 11 2020
!
upgrade fpd auto
version 15.0
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
!
!
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
redundancy
!
!
ip tcp synwait-time 5
!
!
!
!
!
!
!
!
interface Loopback1
ip address 4.4.4.4 255.255.255.255
!
!
interface FastEthernet0/0
ip address 192.168.34.4 255.255.255.0
duplex half
!
!
interface FastEthernet1/0
ip address 192.168.14.4 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet1/1
no ip address
shutdown
duplex auto
speed auto
!
!
interface FastEthernet2/0
ip address 192.168.24.4 255.255.255.0
duplex auto
speed auto
!
!
interface FastEthernet2/1
no ip address
shutdown
duplex auto
speed auto
!
!
!
router eigrp 1
network 192.168.34.0
redistribute rip metric 1 1 1 1 1
redistribute ospf 4 metric 1500 100 255 100 1500
redistribute connected metric 1500 100 255 100 1500
!
router ospf 4
log-adjacency-changes
redistribute connected metric 1 subnets
redistribute eigrp 1 subnets
redistribute rip subnets
network 192.168.14.0 0.0.0.255 area 0
distance ospf external 121
!
router rip
version 2
redistribute connected metric 1
redistribute ospf 4 metric 1
redistribute eigrp 1 metric 1
network 192.168.24.0
no auto-summary
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
no cdp log mismatch duplex
!
!
!
!
route-map r4tor3 deny 5
match tag 32
!
route-map r4tor3 permit 10
set tag 42
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
mgcp behavior g729-variants static-pt
!
!
!
gatekeeper
shutdown
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
stopbits 1
line vty 0 4
login
!
end
R4#show ip route
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, + - replicated route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/2] via 192.168.14.1, 00:17:51, FastEthernet1/0
2.0.0.0/32 is subnetted, 1 subnets
R 2.2.2.2 [120/1] via 192.168.24.2, 00:00:21, FastEthernet2/0
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/156160] via 192.168.34.3, 01:45:38, FastEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4 is directly connected, Loopback1
R 192.168.12.0/24 [120/1] via 192.168.24.2, 00:00:21, FastEthernet2/0
O 192.168.13.0/24 [110/2] via 192.168.14.1, 00:17:51, FastEthernet1/0
192.168.14.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.14.0/24 is directly connected, FastEthernet1/0
L 192.168.14.4/32 is directly connected, FastEthernet1/0
D 192.168.23.0/24 [90/30720] via 192.168.34.3, 01:45:39, FastEthernet0/0
192.168.24.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.24.0/24 is directly connected, FastEthernet2/0
L 192.168.24.4/32 is directly connected, FastEthernet2/0
192.168.34.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.34.0/24 is directly connected, FastEthernet0/0
L 192.168.34.4/32 is directly connected, FastEthernet0/0
R4#
output:
R4#traceroute 1.1.1.1 source 4.4.4.4
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.14.1 16 msec 8 msec 12 msec
R4#traceroute 2.2.2.2 source 4.4.4.4
Type escape sequence to abort.
Tracing the route to 2.2.2.2
1 192.168.24.2 20 msec 16 msec 24 msec
R4#trac
R4#traceroute 3.3.3.3 sou
R4#traceroute 3.3.3.3 source 4.4.4.4
Type escape sequence to abort.
Tracing the route to 3.3.3.3
1 192.168.34.3 12 msec 16 msec 8 msec
R4#
Hello Gowthamraj
As mentioned in some previous posts, it is not easy nor convenient to look through configuration files of devices without the benefit of having a live CLI session to input verification commands in a topology. However, briefly looking at your output it does seem to conform with the requirements listed in the lab including the requirement of a single hop for the traceroute.
I hope this has been helpful!
Laz
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I really love how you have taught this topic. I feel like when I have learned it in the past it was oversimplified. You brought up the real issues that are likely to happen. I prefer your AD fix in this scenario, but the route tagging looks great too.
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