From: hong tony (aamercado31@xxxxxxxxx)
Date: Mon Apr 22 2002 - 01:12:10 GMT-3
Hi all
I went ahead and followed Parry and Denise suggestions
which again was a no go for secondary address but the
tunnel only with no secondary still was the best
suggestions. I'll post the tunnel scenario first, then
following parry's and denise.
Basically on parry's - r3 didn't see the 80.x routes
and r6 8.x had a /25 which was weird
Denise - couldn't do at all.
Tunnel scenario:
hostname r8
!
interface Loopback0
ip address 172.16.80.1 255.255.255.128
no ip directed-broadcast
!
interface Loopback1
ip address 172.16.80.129 255.255.255.128
no ip directed-broadcast
!
interface Loopback10
ip address 172.16.8.1 255.255.255.0
no ip directed-broadcast
!
interface Tunnel0
ip address 172.16.254.1 255.255.255.128
no ip directed-broadcast
tunnel source 172.16.86.8
tunnel destination 172.16.86.6
!
interface Serial0
ip address 172.16.86.8 255.255.255.0
r8#sh ip route
172.16.0.0/16 is variably subnetted, 6 subnets, 2
masks
C 172.16.254.0/25 is directly connected, Tunnel0
C 172.16.80.128/25 is directly connected, Loopback1
C 172.16.8.0/24 is directly connected, Loopback10
I 172.16.100.0/24 [100/6476] via 172.16.86.6,
00:01:04, Serial0
C 172.16.86.0/24 is directly connected, Serial0
C 172.16.80.0/25 is directly connected, Loopback0
################################
hostname r6
ip subnet-zero
interface Tunnel0
ip address 172.16.254.2 255.255.255.128
no ip directed-broadcast
tunnel source 172.16.86.6
tunnel destination 172.16.86.8
!
interface Serial0/0
ip address 172.16.86.6 255.255.255.0
no ip directed-broadcast
no ip mroute-cache
no fair-queue
clockrate 2000000
!
interface Serial0/1
no ip address
no ip directed-broadcast
encapsulation frame-relay
clockrate 128000
!
interface Serial0/1.2 multipoint
ip address 172.16.100.6 255.255.255.224
no ip directed-broadcast
ip ospf network point-to-multipoint
frame-relay map ip 172.16.100.3 603 broadcast
router ospf 1
summary-address 172.16.100.0 255.255.255.0
redistribute connected subnets route-map serial
redistribute igrp 68 subnets
network 172.16.100.0 0.0.0.31 area 0
log-adjacency-changes
!
router igrp 68
redistribute ospf 1 metric 1544 2000 255 1 1500
passive-interface Serial0/1.2
network 172.16.0.0
metric weights 0 1 0 0 0 0
!
ip classless
access-list 5 permit 172.16.86.0 0.0.0.255
access-list 5 permit 172.16.100.0 0.0.0.15
route-map serial permit 10
match ip address 5
r6#sh ip route
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 8 subnets, 4
masks
C 172.16.254.0/25 is directly connected, Tunnel0
I 172.16.80.128/25 [100/1111111] via 172.16.254.1,
00:00:54, Tunnel0
I 172.16.8.0/24 [100/6476] via 172.16.86.8, 00:00:54,
Serial0/0
O 172.16.100.0/24 is a summary, 00:11:52, Null0
C 172.16.100.0/27 is directly connected, Serial0/1.2
O 172.16.100.3/32 [110/781] via 172.16.100.3,
00:11:58, Serial0/1.2
C 172.16.86.0/24 is directly connected, Serial0/0
I 172.16.80.0/25 [100/1111111] via 172.16.254.1,
00:00:55, Tunnel0
###############
hostname r3
!
ip subnet-zero
!
interface Serial1
ip address 172.16.100.3 255.255.255.224
no ip directed-broadcast
encapsulation frame-relay
ip ospf network point-to-multipoint
logging event subif-link-status
logging event dlci-status-change
frame-relay map ip 172.16.100.6 306 broadcast
!
router ospf 1
network 172.16.100.0 0.0.0.31 area 0
!
ip classless
r3#i
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 7 subnets, 4
masks
O E2 172.16.80.128/25 [110/20] via 172.16.100.6,
00:14:12, Serial1
O E2 172.16.8.0/24 [110/20] via 172.16.100.6,
00:14:12, Serial1
O E2 172.16.100.0/24 [110/20] via 172.16.100.6,
00:14:02, Serial1
C 172.16.100.0/27 is directly connected, Serial1
O 172.16.100.6/32 [110/64] via 172.16.100.6,
00:15:33, Serial1
O E2 172.16.86.0/24 [110/20] via 172.16.100.6,
00:15:33, Serial1
O E2 172.16.80.0/25 [110/20] via 172.16.100.6,
00:14:12, Serial1
NOW WITH DENISE:
#######################
r8#sh runn int lo0
Building configuration...
Current configuration:
!
interface Loopback0
ip address 172.16.80.1 255.255.255.128
no ip directed-broadcast
end
r8#c
r8(config)#int lo0
r8(config-if)#ip add 172.16.80.2 255.255.255.0 sec
172.16.80.0 overlaps with Loopback1
r8(config-if)#end
r8#
01:58:03: %SYS-5-CONFIG_I: Configured from console by
console
r8#sh runn int lo1
Building configuration...
Current configuration:
!
interface Loopback1
ip address 172.16.80.129 255.255.255.128
no ip directed-broadcast
end
##############################
Parry's suggestion:
R8:
!
hostname r8
!
ip subnet-zero
interface Loopback0
ip address 172.16.80.1 255.255.255.128
no ip directed-broadcast
!
interface Loopback1
ip address 172.16.80.129 255.255.255.128
no ip directed-broadcast
!
interface Loopback10
ip address 172.16.8.1 255.255.255.0
no ip directed-broadcast
!
interface Serial0
ip address 172.16.86.1 255.255.255.128 secondary
ip address 172.16.86.8 255.255.255.0
no ip directed-broadcast
no ip split-horizon
no ip mroute-cache
no fair-queue
!
router igrp 68
network 172.16.0.0
metric weights 0 1 0 0 0 0
distribute-list 10 out igrp 68
!
ip classless
!
access-list 10 deny 172.16.100.0 0.0.0.127
access-list 10 permit any
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 6 subnets, 2
masks
C 172.16.80.128/25 is directly connected,
Loopback1
C 172.16.8.0/24 is directly connected,
Loopback10
I 172.16.100.0/25 [100/6476] via 172.16.86.6,
00:00:48, Serial0
C 172.16.86.0/25 is directly connected, Serial0
C 172.16.86.0/24 is directly connected, Serial0
C 172.16.80.0/25 is directly connected,
Loopback0
######
r6
interface Serial0/0
ip address 172.16.86.2 255.255.255.128 secondary
ip address 172.16.86.6 255.255.255.0
no ip directed-broadcast
no ip split-horizon
no ip mroute-cache
no fair-queue
clockrate 2000000
!
interface Serial0/1
no ip address
no ip directed-broadcast
encapsulation frame-relay
clockrate 128000
!
interface Serial0/1.2 multipoint
ip address 172.16.100.6 255.255.255.224
no ip directed-broadcast
ip ospf network point-to-multipoint
frame-relay map ip 172.16.100.3 603 broadcast
!
router ospf 1
summary-address 172.16.100.0 255.255.255.0
redistribute connected subnets route-map serial
redistribute igrp 68 subnets
network 172.16.100.0 0.0.0.31 area 0
log-adjacency-changes
!
router igrp 68
redistribute ospf 1 metric 1544 2000 255 1 1500
passive-interface Serial0/1.2
network 172.16.0.0
metric weights 0 1 0 0 0 0
distribute-list 10 out igrp 68
!
ip classless
!
access-list 5 permit 172.16.86.0 0.0.0.255
access-list 5 permit 172.16.100.0 0.0.0.15
access-list 10 deny 172.16.80.128 0.0.0.127
access-list 10 deny 172.16.80.0 0.0.0.127
access-list 10 deny 172.16.8.0 0.0.0.127
access-list 10 permit any
route-map serial permit 10
match ip address 5
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 8 subnets, 4
masks
I 172.16.80.128/25 [100/6476] via 172.16.86.1,
00:00:40, Serial0/0
I 172.16.8.0/25 [100/6476] via 172.16.86.8,
00:00:40, Serial0/0
O 172.16.100.0/24 is a summary, 00:04:50, Null0
C 172.16.100.0/27 is directly connected,
Serial0/1.2
O 172.16.100.3/32 [110/781] via 172.16.100.3,
00:04:03, Serial0/1.2
C 172.16.86.0/25 is directly connected,
Serial0/0
C 172.16.86.0/24 is directly connected,
Serial0/0
I 172.16.80.0/25 [100/6476] via 172.16.86.1,
00:00:40, Serial0/0
####
r3:
interface Serial1
ip address 172.16.100.3 255.255.255.224
no ip directed-broadcast
encapsulation frame-relay
ip ospf network point-to-multipoint
logging event subif-link-status
logging event dlci-status-change
frame-relay map ip 172.16.100.6 306 broadcast
!
router ospf 1
network 172.16.100.0 0.0.0.31 area 0
Gateway of last resort is not set
172.16.0.0/16 is variably subnetted, 5 subnets, 4
masks
O E2 172.16.100.0/24 [110/20] via 172.16.100.6,
00:04:53, Serial1
C 172.16.100.0/27 is directly connected, Serial1
O 172.16.100.6/32 [110/64] via 172.16.100.6,
00:04:53, Serial1
O E2 172.16.86.0/25 [110/20] via 172.16.100.6,
00:04:53, Serial1
O E2 172.16.86.0/24 [110/20] via 172.16.100.6,
00:04:53, Serial1
--- "Chua, Parry" <Parry.Chua@compaq.com> wrote:
> Hello Tony,
> Your R8 has two interface with /25 and one
> interface /24, and you rung igrp here, right ?
> The next hop router R6 also run igrp with /24 to R8,
> right ?
>
> In this case, you can setup secondary ip address at
> R8 s0 wich gas a /24 subnet, the ideal here is to
> send the two /25 as one /24 to next hop, setup
> secondary ip address at s0 said 172.16.86.1/25,
> or 172.16.86.129/25, you may has to disable sp at
> this interface and then do filtering to act as sp is
> on. So you should able to send 172.16.80.0 from R8
> to R6 and appear as 172.16.80.0/24.
>
> Try it out..
>
> > Parry Chua
> >
> >
>
>
> -----Original Message-----
> From: hong tony [mailto:aamercado31@yahoo.com]
> Sent: Monday, April 22, 2002 5:58 AM
> To: Lupi, Guy; ying chang; nigel_taylor@hotmail.com;
> ccielab@groupstudy.com
> Subject: RE: FLSM has longer mask than VLSM Probl.
>
>
> Hi all
>
> The tunnel alone worked, no secondary..thanks for
> the
> help:
>
> Here is what I tried:
>
> Tunnel only btwn r8/r6 using ip add for tunnel
> source/destination --worked like a charm
>
> tunnel only btwn r8/r6 using interface for tunnel
> source and ip add for tunnel destination -- it look
> like there was a split horizon issue
>
> Tried secondary address with:
> 1. Ying's suggestion - no go
> 2. your -- no go
>
>
>
> --- "Lupi, Guy" <Guy.Lupi@eurekaggn.com> wrote:
> > The tunnel just has to be in the same classful
> > network with the same subnet
> > mask, it doesn't have to match the third octet in
> > your case. You could use
> > 172.16.254.0/25 for the tunnel to get the /25's
> from
> > r8 to r6, and you can
> > put a secondary address of 172.16.100.254/24 on
> > serial 1 of r6 to get
> > 172.16.100.0/24 to r8. That should take care of
> > both problems.
> >
> > ~-----Original Message-----
> > ~From: hong tony [mailto:aamercado31@yahoo.com]
> > ~Sent: Sunday, April 21, 2002 4:30 PM
> > ~To: ying chang; ccielab@groupstudy.com
> > ~Subject: Re: FLSM has longer mask than VLSM
> Probl.
> > ~
> > ~
> > ~Ying
> > ~
> > ~That is one of my dilemnas. I want to stick with
> > the
> > ~80.x subnetwork with the /25 mask and I am
> already
> > ~using 80.1 and 80.129 so there is no more address
> > to
> > ~use for secondary or tunnels.
> > ~
> > ~
> > ~--- ying chang <ying_c@hotmail.com> wrote:
> > ~> The netmask in flsm has to be the same (see
> Doyle
> > I
> > ~> pg 205), i.e. you either
> > ~> have to use all /24 or all /25 in your igrp
> > domain.
> > ~> If you don't want to
> > ~> change that, you can add a secondary address or
> > ~> tunnel with /25 netmask to
> > ~> bring the network to ospf. Make sure you either
> > turn
> > ~> off split-horizon or
> > ~> use unicast instead of broadcast if you decide
> to
> > ~> use the secondary address.
> > ~> Which domain has a longer netmask is non-issue
> > here.
> > ~>
> > ~>
> > ~> >From: hong tony <aamercado31@yahoo.com>
> > ~> >Reply-To: hong tony <aamercado31@yahoo.com>
> > ~> >To: ccielab@groupstudy.com
> > ~> >Subject: FLSM has longer mask than VLSM Probl.
> > ~> >Date: Sun, 21 Apr 2002 12:06:33 -0700 (PDT)
> > ~> >
> > ~> >HI
> > ~> >
> > ~> >I search the archives and can't find an answer
> > for
> > ~> >this one.
> > ~> >
> > ~> >\lo0
> > ~> >r8----r6-----r3
> > ~> >/lo1
> > ~> >
> > ~> >r8/r6 is IGRP with r6 as the redistributing
> > router
> > ~> for
> > ~> >the OSPF on r6/r13
> > ~> >
> > ~> >r8 ip address:
> > ~> >lo0 = 172.16.80.1/25
> > ~> >lo1 = 172.16.80.129/25
> > ~> >s0= 172.16.86.8/24
> > ~> >
> > ~> >r6 ip address:
> > ~> >s0 = 172.16.86.6/24
> > ~> >s1 = 172.16.100.6/27
> > ~> >
> > ~> >r3 ip address:
> > ~> >s1 = 172.16.100.3/27
> > ~> >
> > ~> >My question is - How can I can the 172.16.80.0
> > ~> network
> > ~> >into r6 routing table?
> > ~> >
> > ~> >If I put "ip route 172.16.80.0 255.255.255.0
> > null0"
> > ~> >the route would propagate to r6/r3. However,
> > ~> obviously
> > ~> >I do not want to do statics...so here were my
> > ~> >alternative attempts.
> > ~> >
> > ~> >1. default-network - Can't do it cuz of the
> > ~> classful
> > ~> >nature of this command which would propagate a
> > ~> static
> > ~> >route into r8.
> > ~> >
> > ~> >2. Summarizing - Nope cuz the IGRP (FLSM) has
> a
> > ~> longer
> > ~> >mask than OSPF (VLSM)
> > ~> >
> > ~> >3. secondary address - Because of the
> > ~> 172.16.80.x/25
> > ~> >mask is using up all the subnetworks for 80.x,
> I
> > ~> don't
> > ~> >have any other address to use for secondary
> > ~> >
> > ~> >4. tunnelling - same problem as #3
> > ~> >
> > ~> >5. policy routing - I can't see this as
> > applicable
> > ~> >
> > ~> >Is this possible or am I stuck to the null 0
> > ~> option.
> > ~> >
> > ~> >Thanks
> > ~> >
> > ~> >
> > ~>
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:58:15 GMT-3