Thanks again for taking the time to have a look at this. Other than
Groupstudy, there isn't a very large pool of people you can ask for help on
some of the CCIE lab topics without watching the other person's eyes glaze
over :)
Roy - I was under the impression that I would not need PIM enabled on the
fa0/0 of R2. Is that incorrect? I tried enabling it, but was still unable
to pass the traffic.
Andrew - I gave it a run with DNS and could not get it working either, I
added udp 53 to the ip forward-protocol as well as to my ACLs but wasn't
able to see it on the other side or able to see it leave R2 as a multicast
for that matter. One thing I noticed is that even after typing in ip
forward-protocol 53 or ip forward-protocol domain that it does not show up
in the config. Is this a default setting?
I took a look at my mroute statements as well, and the entries are there,
however R3 and R4 have Null incoming interfaces for the 10.1.12.1, 224.1.1.1
entry. I am assuming that this is because they never receive an incoming
packet from a source for group 224.1.1.1?
Here are the Mroutes:
R2(config)#do sh ip mroute 224.1.1.1
(*, 224.1.1.1), 00:34:35/00:03:20, RP 2.2.2.2, flags: S
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Sparse, 00:34:35/00:03:20
(10.1.12.1, 224.1.1.1), 00:13:16/00:03:24, flags: T
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Sparse, 00:13:16/00:03:20
R3(config)#do sh ip mroute 224.1.1.1
(*, 224.1.1.1), 00:36:26/00:02:59, RP 2.2.2.2, flags: SJCL
Incoming interface: FastEthernet0/1, RPF nbr 10.1.34.3
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 00:36:26/00:02:02
(10.1.12.1, 224.1.1.1), 00:01:33/00:01:26, flags: LJ
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Sparse, 00:01:33/00:02:58
FastEthernet0/0, Forward/Sparse, 00:01:33/00:02:02
R4(config)#do sh ip mroute
(*, 224.1.1.1), 00:28:06/00:02:59, RP 2.2.2.2, flags: SJCL
Incoming interface: FastEthernet0/1, RPF nbr 10.1.34.3
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 00:28:06/00:02:20
(10.1.12.1, 224.1.1.1), 00:02:19/00:00:40, flags: LJ
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/1, Forward/Sparse, 00:02:19/00:02:26
FastEthernet0/0, Forward/Sparse, 00:02:19/00:02:20
Here is my configs from R2, R3 and R4
R2:
interface Loopback0
ip address 2.2.2.2 255.0.0.0
ip pim sparse-mode
!
interface FastEthernet0/0
ip address 10.1.12.2 255.255.255.0
ip pim sparse-mode
ip multicast helper-map broadcast 224.1.1.1 100 ttl 5
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 10.1.23.2 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
router ospf 100
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 10.1.23.2 0.0.0.0 area 0
!
ip forward-protocol nd
ip forward-protocol udp rip
!
!
ip http server
no ip http secure-server
ip pim bsr-candidate Loopback0 0
ip pim rp-candidate Loopback0
!
access-list 100 permit udp any any eq rip
access-list 100 permit udp any any eq domain
R3:
interface Loopback0
ip address 3.3.3.3 255.0.0.0
!
interface FastEthernet0/0
ip address 10.1.23.3 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 10.1.34.3 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
router ospf 100
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0
R4:
interface Loopback0
ip address 4.4.4.4 255.0.0.0
ip pim sparse-mode
!
interface FastEthernet0/0
ip address 10.1.45.4 255.255.255.0
ip directed-broadcast
ip pim sparse-mode
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 10.1.34.4 255.255.255.0
ip pim sparse-mode
ip multicast helper-map 224.1.1.1 10.1.45.255 100
duplex auto
speed auto
!
router ospf 100
log-adjacency-changes
network 4.4.4.4 0.0.0.0 area 0
network 10.1.34.4 0.0.0.0 area 0
!
ip forward-protocol nd
ip forward-protocol udp rip
!
!
ip http server
no ip http secure-server
!
access-list 100 permit udp any any eq rip
access-list 100 permit udp any any eq domain
On Fri, Nov 20, 2009 at 10:56 AM, ALL From_NJ <all.from.nj_at_gmail.com> wrote:
> I have to run out in 2 minutes, but can add more color later.
>
> Nate - can you try this with DNS and then paste your configs if it does not
> work?
>
> I labbed this and got DNS lookups to work fairly easily, but did not get
> RIP to be forwarded. I need a little more time to look at RIP, however dns
> bcasts on one side are forwarded across to the other ... I am trying to
> squeeze this lab test in between a mountain of other end of week tasks. ;-)
>
>
> Not to be silly with this next suggestion Nate, however ... when forwarding
> the DNS, make sure that the correct port numbers are specified in the
> forward-protocol command and the access-list. I originally copied and
> pasted the command reference into notepad and forgot to change these. Oh
> well ... trying to be too quick.
>
> Also, a pretty cool thing to do across the network before and during the
> test is the show ip mroute command. You will see incoming and outgoing
> interfaces added accordingly. Keep it nerdy!
>
> Team ---> TGIF!
>
> Chat soon,
>
> Andrew
>
>
> On Fri, Nov 20, 2009 at 4:33 AM, Roy Waterman <roy.waterman_at_gmail.com>wrote:
>
>> Hi Nate
>>
>> It looks like you are missing:
>>
>> *ip pim sparse-mode* on R2 f0/0.
>>
>> This command does show on the config guide.
>> With all the commands needed for mcast helper map, it is so easy to miss
>> the
>> odd command.
>> Other than that, your config looks great to me.
>>
>> Give that a go and let us know if that resolves matters.
>>
>> Regards
>> Roy
>>
>> 2009/11/14 Nate Lee <natetlee_at_gmail.com>
>>
>> > I am having an issue getting the ip helper-map to work and after going
>> over
>> > my configs 3 or 4 times am still not sure what the problem is. Any
>> hints
>> > or
>> > pointers in the right direction would be greatly appreciated. I am
>> trying
>> > to get one router to send a RIPv2 broadcast which should be picked up by
>> > another router, translated using the multicast helper-map to 224.1.1.1
>> and
>> > then sent across an OSPF domain where it is converted back to a
>> broadcast
>> > at
>> > the other side and received by another RIP router.
>> >
>> > *The setup:*
>> >
>> > I have 5 routers setup in a straight line R1 <> R2 <> R3 <> R4 <> R5.
>> > Multicast routing is enabled on R2, R3 and R4.
>> >
>> > R2, R3 and R4 are all running PIM sparse mode on their loopbacks and
>> their
>> > interfaces facing each other.
>> >
>> > R1 and R5 are speaking RIPv2 and R2, R3 and R4 are using OSPF. I am
>> trying
>> > to get R5 to receive RIP routes from R1.
>> >
>> > R1 has the v2-broadcast turned on on its interface facing R2. R2 is
>> able
>> > to
>> > see these broadcasts with a packet debug.
>> >
>> > R2 is the BSR and RP for the three routers running OSPF, multicast
>> routing
>> > is not enabled on R1 or R5.
>> >
>> > The helper map is configured on R2's interface fa0/0 which is facing R1
>> and
>> > should take RIP broadcasts and convert them to the 224.1.1.1 group.
>> >
>> > There is another helper-map on R4's fa0/1 interface which faces R3 and
>> is
>> > configured to receive the 224.1.1.1 group and send a broadcast to
>> > 10.1.45.255.
>> >
>> > IP Directed-broadcast is enabled on R4's fa0/0 interface facing R5.
>> >
>> > R5 is configured with no validate-update-source to prevent it from
>> dropping
>> > any packets that appear from R1's 10.1.12.1 address.
>> >
>> > *The problem:*
>> >
>> > When I debug IP mpacket and debug IP packet on R2, I am able to see the
>> RIP
>> > broadcasts from R1, but it appears that they are never sent out as the
>> > 224.1.1.1 multicast address
>> >
>> > R5 never receives any packets from R1, a debug IP mpacket on R2 R3 and
>> R4
>> > show no packets to 224.1.1.1 ever being sent anywhere.
>> >
>> > *The configs:
>> > *
>> > R1:
>> >
>> > interface FastEthernet0/0
>> > ip address 10.1.12.1 255.255.255.0
>> > ip rip v2-broadcast
>> >
>> > router rip
>> > version 2
>> > network 1.0.0.0
>> > network 10.0.0.0
>> > no auto-summary
>> >
>> > R2:
>> >
>> > interface FastEthernet0/0
>> > ip address 10.1.12.2 255.255.255.0
>> > ip multicast helper-map broadcast 224.1.1.1 100 ttl 4
>> > !
>> > interface FastEthernet0/1
>> > ip address 10.1.23.2 255.255.255.0
>> > ip pim sparse-mode
>> > !
>> > router ospf 100
>> > network 2.2.2.2 0.0.0.0 area 0
>> > network 10.1.23.2 0.0.0.0 area 0
>> > !
>> > ip forward-protocol udp rip
>> > !
>> > ip pim bsr-candidate Loopback0 0
>> > ip pim rp-candidate Loopback0
>> > !
>> > access-list 100 permit udp any any eq rip
>> >
>> > R3:
>> >
>> > interface FastEthernet0/0
>> > ip address 10.1.23.3 255.255.255.0
>> > ip pim sparse-mode
>> > !
>> > interface FastEthernet0/1
>> > ip address 10.1.34.3 255.255.255.0
>> > ip pim sparse-mode
>> > !
>> > router ospf 100
>> > network 0.0.0.0 255.255.255.255 area 0
>> >
>> > R4:
>> >
>> > interface FastEthernet0/0
>> > ip address 10.1.45.4 255.255.255.0
>> > ip directed-broadcast
>> > ip igmp join-group 224.1.1.1
>> > !
>> > interface FastEthernet0/1
>> > ip address 10.1.34.4 255.255.255.0
>> > ip pim sparse-mode
>> > ip multicast helper-map 224.1.1.1 10.1.45.255 100
>> > !
>> > router ospf 100
>> > network 4.4.4.4 0.0.0.0 area 0
>> > network 10.1.34.4 0.0.0.0 area 0
>> > !
>> > ip forward-protocol nd
>> > ip forward-protocol udp rip
>> >
>> > R5:
>> >
>> > interface FastEthernet0/0
>> > ip address 10.1.45.5 255.255.255.0
>> > !
>> > router rip
>> > version 2
>> > no validate-update-source
>> > network 10.0.0.0
>> > no auto-summary
>> >
>> > *The shows and debugs:
>> >
>> > *
>> > From R2 with debug ip packet and mpacket enabled, notice no packets to
>> > 224.1.1.1 are ever sent:
>> >
>> > *Mar 1 01:29:53.599: IP: s=10.1.12.1 (FastEthernet0/0),
>> d=255.255.255.255,
>> > len 52, rcvd 2
>> > *Mar 1 01:29:53.603: UDP src=520, dst=520
>> >
>> > From R4:
>> >
>> > R4(config-if)#*do sh ip mroute*
>> >
>> > IP Multicast Routing Table
>> > <output omitted>
>> >
>> > (*, 224.1.1.1), 01:21:43/00:02:57, RP 2.2.2.2, flags: SJCL
>> > Incoming interface: FastEthernet0/1, RPF nbr 10.1.34.3
>> > Outgoing interface list:
>> > FastEthernet0/0, Forward/Sparse, 00:41:58/00:02:54
>> >
>> > (*, 224.0.1.40), 01:24:27/00:02:52, RP 0.0.0.0, flags: DCL
>> > Incoming interface: Null, RPF nbr 0.0.0.0
>> > Outgoing interface list:
>> > Loopback0, Forward/Sparse, 01:24:27/00:02:52
>> >
>> >
>> > R4(config-if)#*do sh ip pim rp map 224.1.1.1*
>> >
>> > PIM Group-to-RP Mappings
>> >
>> > Group(s) 224.0.0.0/4
>> > RP 2.2.2.2 (?), v2
>> > Info source: 2.2.2.2 (?), via bootstrap, priority 0, holdtime 150
>> > Uptime: 01:24:07, expires: 00:01:48
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>>
>>
>> --
>> Regards
>> Roy
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net
Received on Sat Nov 21 2009 - 14:50:43 ART
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