From: Padhu (LFG) (padhu@xxxxxxxxxxxx)
Date: Mon Jan 22 2001 - 14:19:42 GMT-3
I tried a similar setup over the weeekend ...I have R1 and R2 on ethernet
with R1 as the hub
and have r3 and r4 as spokes all joining 225.5.5.5 in sparse dense on all
router's ethernet ...when i ping from the spokes i always get ping response
ONLY from R2's ethernet ..If i shut R2's ethernet then R1's ethernet
responds ....any Ideas ? Why is that R1 doesn;t respond but the next nop
farther away from it responds ..
Cheers,Padhu
-----Original Message-----
From: Connary, Julie Ann [mailto:jconnary@cisco.com]
Sent: Monday, January 22, 2001 8:04 AM
To: ccielab@groupstudy.com
Subject: ping a multicast address question
Hi All,
I have a simple multicast network setup:
R3 - S0
|
|
Frame Cloud - with R3 as hub
/ \
R2 R1
E0 E0
I have pim sparse mode configured. R3 is my RP using Auto-rp
Basically all 3 routers are connected into the frame on S0. R1 and R2 has
E0 configured.
S0 on all three routers and E0 on R1 and R2 are joined into the multicast
group 224.2.2.2 using
the command ip igmp join-group. R3 also has ip pim nbma-mode configured.
So when I ping 224.2.2.2 from R1 I get:
r2#ping 224.2.2.2
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 224.2.2.2, timeout is 2 seconds:
Reply to request 0 from 170.100.2.2, 12 ms
Reply to request 0 from 170.100.10.1, 168 ms
Reply to request 0 from 170.100.10.1, 160 ms
Reply to request 0 from 170.100.10.1, 148 ms
Reply to request 0 from 170.100.10.3, 128 ms
Reply to request 0 from 170.100.10.3, 116 ms
Reply to request 0 from 170.100.10.1, 68 ms
Reply to request 0 from 170.100.10.1, 60 ms
Reply to request 0 from 170.100.10.3, 32 ms
Reply to request 0 from 170.100.10.3, 20 ms
Why do the routers all respond so many times?
I was able to use mcaster and put a pc on both R1 and R2's ethernets and it
worked great. But I hear
in the lab you have to be able to ping your RP. So I was trying to
understand how to do that correctly.
R3:
ip multicast-routing
ip dvmrp route-limit 20000
clock timezone est -5
!
!
!interface Ethernet0
ip address 170.100.3.3 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
ip ospf interface-retry 0
!
interface Serial0
ip address 170.100.10.3 255.255.255.0
no ip directed-broadcast
ip pim nbma-mode
ip pim sparse-mode
encapsulation frame-relay
ip ospf interface-retry 0
ip ospf priority 10
ip igmp join-group 224.2.2.2
frame-relay map ip 170.100.10.1 301 broadcast
frame-relay map ip 170.100.10.2 302 broadcast
frame-relay lmi-type ansi
router ospf 1
network 170.100.3.0 0.0.0.255 area 34
network 170.100.10.0 0.0.0.255 area 0
neighbor 170.100.10.1
neighbor 170.100.10.2
!
ip classless
ip pim send-rp-announce Serial0 scope 16
ip pim send-rp-discovery scope 16
R2:
ip subnet-zero
no ip domain-lookup
ip multicast-routing
ip dvmrp route-limit 20000
!
!
!
interface Ethernet0
ip address 170.100.2.2 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
ip ospf interface-retry 0
ip igmp join-group 224.2.2.2
!
interface Serial0
ip address 170.100.10.2 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
encapsulation frame-relay
ip ospf interface-retry 0
ip ospf priority 0
ip igmp join-group 224.2.2.2
no ip mroute-cache
no fair-queue
clockrate 2000000
frame-relay map ip 170.100.10.1 203 broadcast
frame-relay map ip 170.100.10.3 203 broadcast
frame-relay lmi-type ansi
R1:
ip subnet-zero
no ip domain-lookup
ip multicast-routing
ip dvmrp route-limit 20000
clock timezone est -5
!
!
!
interface Ethernet0
ip address 170.100.1.1 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
ip ospf interface-retry 0
ip igmp join-group 224.2.2.2
interface Serial0
ip address 170.100.10.1 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
encapsulation frame-relay
ip ospf interface-retry 0
ip ospf priority 0
ip igmp join-group 224.2.2.2
no fair-queue
clockrate 2000000
frame-relay map ip 170.100.10.2 103 broadcastframe-relay map ip
170.100.10.3 103 broadcast
frame-relay lmi-type ansi
!
Thanks Julie Ann
------------------------------------------------------------------------
Julie Ann Connary
| | Network Consulting Engineer
||| ||| Federal Support Program
.|||||. .|||||. 13635 Dulles Technology Drive,
Herndon VA 20171
.:|||||||||:.:|||||||||:. Pager: 1-888-642-0551
c i s c o S y s t e m s Email: jconnary@cisco.com
------------------------------------------------------------------------
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