06-03-2006 01:07 AM - edited 03-03-2019 12:53 PM
HI
IF I Have 5 separeted dist connected to the core.i have summarized to the core; i have this network.
10.1.0.0
10.2.0.0
10.3.0.0
10.4.0.0
10.5.0.0
the routing protocole is EIGRP.i dont need to confuse the core that it can reach the 10.0.0.0 network through 4 interfaces.how can i configure the 4 dist to do not confuse the CORE
ps have a look to this config
dist 1
int gig0/1
address subnet mask
eigrp sumaary-address 100 10.1.0.0 255.255.0.0
!
dist 2
int gig0/1
address subnet mask
eigrp sumaary-address 100 10.2.0.0 255.255.0.0
!
dist 3
int gig0/1
address subnet mask
eigrp sumaary-address 100 10.3.0.0 255.255.0.0
!
dist 4
int gig0/1
address subnet mask
eigrp sumaary-address 100 10.3.0.0 255.255.0.0
!
just i need to reduce the overload on the core. CONFIGURATION OF THESE DIST VERY MUCH APPRECATED + CHECK THE ABOUVE CONFIG ON THE DIST ;AND ADVISE ME WHERE IS MY MISTAKE
10xs
ali
06-03-2006 04:11 AM
Hello Ali,
I guess you are having problems with EIGRP implementations.
Try Jeff Doyle's book TCP/IP good resource on the subject.
But, 1 question? Is auto-summary enabled on your routers?
Why are you concerned about a route to 10.0.0.0/8? just type no auto-summary under the EIGRP process and you're good to go.
Also, if you really concerned about "this overload" issue, check EIGRP STUB configurations.
But if you have many subnets for each /16 (10.1.0.0, 10.2.0.0 etc) then the best would be:
ip summary-address eigrp 100 under the correct interface.
The question is: how high is the cpu utilization on your routers?
for your other post I believe that your main concern would be the amount of traffic sent between the routers, not really a "overload" issue for the router itself, as youre using wireless links? am I right?
you could try something like:
ip bandwidth-percent eigrp 100 40
to reduce the amount of routing information sent between the routers.
Please let us know the exact reason for your concern.
HTH,
if it does, please rate this post.
Vlad
06-03-2006 04:22 AM
hi vlad 10xs for ur reply
have a look to this config,where i'm mistake
dist 1
router eigrp 100
network 10.0.0.0
!
int gig0/1
address subnet mask
ip sumary-address 100 10.1.0.0 255.255.0.0
!
dist 2
int gig0/1
address subnet mask
ip sumaary-address 100 10.2.0.0 255.255.0.0
!
router eigrp 100
network 10.0.0.0
no auto-sumary
!
dist 3
int gig0/1
address subnet mask
ip sumary-address 100 10.3.0.0 255.255.0.0
!
router eigrp 100
no auto-sumary
network 10.0.0.0
dist 4
int gig0/1
address subnet mask
ip sumary sumaary-address 100 10.3.0.0 255.255.0.0
!
router eigrp 100
network 10.0.0.0
no auto-sumary
10xs
06-03-2006 04:26 AM
summary address command is not correct.
you're sending the same summary through R3 and R4? is there a reason for this?
Check this link:
HTH,
please rate all helpfull posts,
Vlad
06-03-2006 04:35 AM
HI VLAD 10XS FOR UR REPLY!
CAN U PLZ CORRECT TO ME THIS CONFIG TO WORK FINE
10XS
06-03-2006 04:58 AM
06-03-2006 05:12 AM
hi vlad
check now the config.it will work correctly?
dist 1
router eigrp 100
no auto-summary
network 10.0.0.0
!
int gig0/1
address subnet mask
ip sumary-address 100 10.1.0.0 255.255.0.0
!
dist 2
int gig0/1
address subnet mask
ip sumaary-address 100 10.2.0.0 255.255.0.0
!
router eigrp 100
network 10.0.0.0
no auto-sumary
!
dist 3
int gig0/1
address subnet mask
ip sumary-address 100 10.3.0.0 255.255.0.0
!
router eigrp 100
no auto-sumary
network 10.0.0.0
dist 4
int gig0/1
address subnet mask
ip sumary sumaary-address 100 10.4.0.0 255.255.0.0
!
router eigrp 100
network 10.0.0.0
no auto-sumary
10xs
06-03-2006 05:16 AM
core:
router eigrp 100
network 10.0.0.0
no auto-summary
DS1
router eigrp 100
network 10.0.0.0
passive-interface default
no passive-interface gi0/1
no auto-summary
int gi0/1
ip address
ip summary-address eigrp 100 10.3.0.0 255.255.0.0
DS2
router eigrp 100
network 10.0.0.0
passive-interface default
no passive-interface gi0/1
no auto-summary
int gi0/1
ip address
ip summary-address eigrp 100 10.2.0.0 255.255.0.0
DS3
router eigrp 100
network 10.0.0.0
passive-interface default
no passive-interface gi0/1
no auto-summary
int gi0/1
ip address
ip summary-address eigrp 100 10.4.0.0 255.255.0.0
DS4
router eigrp 100
network 10.0.0.0
passive-interface default
no passive-interface gi0/1
no auto-summary
int gi0/1
ip address
ip summary-address eigrp 100 10.5.0.0 255.255.0.0
But,
Your network seems to be very simple. Star configuration with all remote (DS routers) having the core as its way out.
I think even ODR will be enough to route between these routers.
and there's nothing less "overloading" (beside static routes) than ODR.
I wouldnt use it though, but take a look:
HTH,
Vlad
06-03-2006 05:26 AM
hi vlad
10xs for ur reply
this config it will work correctly;and reduced the ovelod on the core.can u plz explain why u used the passive interface dfault;than no passive interfacegig3/1.
vlad i appreciated ur help
ali
06-03-2006 05:48 AM
passive default is used when you have multiple interfaces on the same subnet covered by the command:
network under router eigrp AS.
so, you dont send EIGRP packets over links you dont have (or dont need) to.
So using no passive-interface gi0/1 will make your DS routers send eigrp packets only to the CORE nowhere else.
avoiding sending multicast packets on the LAN links.
HTH,
if it does, please rate this post.
vlad
06-03-2006 06:00 AM
hi vlad 10xs for ur help!
so this configuration it will work properly depending on the diagram.can u plz explain what is the effect of these command into the core into the core:
ip summary-address eigrp 100 10.1.0.0 255.255.0.0
ip summary-address eigrp 100 10.2.0.0 255.255.0.0
ip summary-address eigrp 100 10.3.0.0 255.255.0.0
ip summary-address eigrp 100 10.4.0.0 255.255.0.0
ip summary-address eigrp 100 10.5.0.0 255.255.0.0
plz explain the effect of this command
10xs
Ali
06-03-2006 06:20 AM
Effects on the Core:
it will show a route in its route table like the below for each summary
D 10.2.0.0/16 [90/2195456] via 10.1.1.2, 00:02:12, Serial0
All subnets inside those /16 will be hidden inside this aggregated route.
Also, a summary route pointing to NULL will be created on the DS routers like:
D 10.2.0.0/16 is a summary, 00:03:22, Null0
This may cause problem when you have discontiguous networks, so be carefull.
the command it self will only be used if there are components of the bigger subnet in your routing table.
Meaning, if you set ip summary-address eigrp 100 172.16.0.0 255.255.0.0, and there's no route like this (172.16.1.0/24, 172.16.5.0/24 etc) on your routing table, then this aggregated route 172.16.0.0/16 wont be advertised out.
Vlad
06-03-2006 09:19 PM
hi vlad
u have mentioned before that passive default is used when we have multiple interfaces on the same subnet.can u explain more?
10xs
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