From: Scott Stoddard (sstoddard@xxxxxxxx)
Date: Sun Mar 31 2002 - 16:29:50 GMT-3
This is not true according to CCO
http://www.cisco.com/warp/public/104/dcprob.html
"Note: You need to configure the demand circuit at one end of the link only.
However, if you configure this command on both ends it does not cause any
harm. "
Have you seen a different result in your experiences?
--Scott
----- Original Message -----
From: "John Mistichelli" <jmistichelli@yahoo.com>
To: "Jason T. Rohm" <jtrohm@athenet.net>; "'Lupi, Guy'"
<Guy.Lupi@eurekaggn.com>; "'CCIELIST (E-mail)'" <ccielab@groupstudy.com>;
<Parry.Chua@compaq.com>
Sent: Sunday, March 31, 2002 5:14 AM
Subject: RE: OSPF Demand Circuit Problems
> Remove the "ip ospf demand-circuit" on one side. You dont need it on both
sides. This can cause a loop.
> John
> 7536
> http://www.routopia.com
>
> "Jason T. Rohm" <jtrohm@athenet.net> wrote: I have tried the "no peer
neighbor-route" solution (see the link in the
> original post). Also, the dialer-watch is there to bring up the link right
> away when the remote network is lost (rather than waiting for traffic). It
> does not effect the way ospf is working (I tried it this afternoon).
>
> When I watched the dialer, the dial reason was always destination
224.0.0.5
> (OSPF)... here is a "debug ip ospf monitor":
>
> 00:03:56: As65 DDR: idle timeout
> 00:03:56: As65 DDR: disconnecting call
> 00:03:58: %LINK-5-CHANGED: Interface Async65, changed state to reset
> 00:03:58: OSPF: 55.55.55.55 address 145.45.45.5 on Async65 is dead, state
> DOWN
> 00:03:58: OSPF: 44.44.44.44 address 145.45.45.4 on Async65 is dead, state
> DOWN
> 00:03:58: OSPF: Schedule SPF in area 1
> Change in LS ID 0.0.0.0, LSA type R,
> 00:03:58: OSPF: schedule SPF: spf_time 00:03:58.555 wait_interval 5s
> 00:03:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface Async65, changed
> state
> to down
> 00:03:59: OSPF: Start redist-scanning
> 00:03:59: OSPF: Scan for redistribution
> 00:03:59: OSPF: End scanning, Elapsed time 16ms
> 00:04:03: %LINK-3-UPDOWN: Interface Async65, changed state to down
> 00:04:03: OSPF: Begin SPF at 0x3B763ms, process time 196ms
> 00:04:03: spf_time 00:03:58.555, wait_interval 5s
> 00:04:03: OSPF: End SPF at 0x3B76Bms, Total elapsed time 8ms
> 00:04:03: Intra: 0ms, Inter: 0ms, External: 8ms
>
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Lupi, Guy
> Sent: Saturday, March 30, 2002 7:43 PM
> To: 'Jason T. Rohm'; CCIELIST (E-mail)
> Subject: RE: OSPF Demand Circuit Problems
>
>
> Try "no peer neighbor-route" on the async interfaces, that will remove the
> /32 ppp route for the opposite side, see how that works out. If you use
> debug ip ospf mon, you will probably see the lsa change for that route. I
> thought I saw something else on this situation, because the async
interface
> doesn't spoof up, when it goes down it also causes an lsa change causing
it
> to dial again. Let us know how it goes.
>
> ~-----Original Message-----
> ~From: Jason T. Rohm [mailto:jtrohm@athenet.net]
> ~Sent: Saturday, March 30, 2002 6:50 PM
> ~To: CCIELIST (E-mail)
> ~Subject: OSPF Demand Circuit Problems
> ~
> ~
> ~Hello,
> ~
> ~I am having difficulty with an OSPF demand circuit running
> ~over an async
> ~interface.
> ~
> ~The line comes up as desired with a dialer watch-group,
> ~however, when the
> ~line goes down again, OSPF shows the LSAs updating and re-dials. This
> ~continues every 120 seconds (idle-timeout) forever.
> ~
> ~As far as I can see, the links are configured properly (ip ospf
> ~demand-circuit, ip ospf network point-to-point).
> ~
> ~There are no other relevant factors (not redistributions or
> ~other unstable
> ~links).
> ~
> ~
> ~My network is configured roughly in a square,
> ~
> ~(This is the Hello Computers Security Lab 2 core network, for
> ~those of you
> ~with access. No other routers are configured right now so as
> ~to eliminate
> ~the possibility of interaction).
> ~
> ~Router 1 and 5 share an ethernet LAN that is area 0.
> ~Router 5 is connected to router 2 via frame.
> ~Router 2 is connected to router 4 via frame.
> ~Router 4 is connected to router 5 via the DDR async.
> ~
> ~All frame/DDR networks are area 1.
> ~
> ~ [R5] --/DDR/-- [R4]
> ~ | |
> ~ /Enet/ /Frame/
> ~ | |
> ~ [R1] -/Frame/- [R2]
> ~
> ~I have reviewed, investigated, and attempted all the
> ~applicable fixes listed
> ~at the following URL:
> ~
> ~http://www.cisco.com/warp/public/104/dcprob.html
> ~
> ~Attached is the complete R4 and R5 configuration along with a up/down
> ~snapshot of the "show ip ospf database" information.
> ~
> ~---------------------------
> ~
> ~Router 4:
> ~
> ~version 12.2
> ~service timestamps debug uptime
> ~service timestamps log uptime
> ~no service password-encryption
> ~!
> ~hostname 2620D-R4
> ~!
> ~enable password cisco
> ~!
> ~username 2610B-R5 callback-dialstring 101 password 0 cisco
> ~memory-size iomem 10
> ~ip subnet-zero
> ~!
> ~!
> ~no ip domain-lookup
> ~ip domain-name toontown.local
> ~!
> ~ip audit notify log
> ~ip audit po max-events 100
> ~ip ssh time-out 120
> ~ip ssh authentication-retries 3
> ~!
> ~chat-script RESET "" "+++ATH\r" OK "ATZ" OK \c
> ~modemcap entry optima_v34:FD=&F:AA=S0=1:CD=&C1:DTR=&D2:HFL=&K1:NEC=E0
> ~call rsvp-sync
> ~!
> ~!
> ~interface Loopback0
> ~ ip address 44.44.44.44 255.255.255.0
> ~ ip ospf network point-to-point
> ~!
> ~interface FastEthernet0/0
> ~ ip address 172.16.44.4 255.255.255.0
> ~ speed 100
> ~ full-duplex
> ~ no cdp enable
> ~!
> ~interface Serial0/0
> ~ ip address 150.50.24.4 255.255.255.0
> ~ encapsulation frame-relay
> ~ ip ospf network point-to-point
> ~ no fair-queue
> ~ frame-relay interface-dlci 142
> ~ frame-relay lmi-type cisco
> ~!
> ~interface Serial0/1
> ~ ip address 150.50.46.4 255.255.255.0
> ~ encapsulation ppp
> ~ clockrate 500000
> ~ no cdp enable
> ~!
> ~interface Async65
> ~ ip address 145.45.45.4 255.255.255.240
> ~ encapsulation ppp
> ~ ip ospf network point-to-point
> ~ ip ospf cost 2000
> ~ ip ospf demand-circuit
> ~ dialer in-band
> ~ dialer idle-timeout 0
> ~ dialer map ip 145.45.45.5 name 2610B-R5 class CALLBACK broadcast 101
> ~ dialer-group 1
> ~ async default routing
> ~ async mode dedicated
> ~ ppp callback accept
> ~ ppp authentication chap
> ~!
> ~router ospf 1
> ~ router-id 44.44.44.44
> ~ log-adjacency-changes
> ~ network 44.44.44.0 0.0.0.255 area 1
> ~ network 145.45.45.0 0.0.0.255 area 1
> ~ network 150.50.24.0 0.0.0.255 area 1
> ~!
> ~ip classless
> ~ip http server
> ~ip pim bidir-enable
> ~!
> ~!
> ~map-class dialer CALLBACK
> ~ dialer callback-server username
> ~access-list 9 deny 224.0.0.0 15.255.255.255
> ~access-list 9 deny any
> ~access-list 9 permit any
> ~access-list 199 permit icmp any any
> ~dialer-list 1 protocol ip list 9
> ~no cdp run
> ~!
> ~dial-peer cor custom
> ~!
> ~!
> ~!
> ~!
> ~banner motd ^C
> ~
> ~**** R4 - 2620D ****
> ~
> ~^C
> ~!
> ~line con 0
> ~ exec-timeout 0 0
> ~ privilege level 15
> ~line aux 0
> ~ modem InOut
> ~ modem autoconfigure type optima_v34
> ~ speed 115200
> ~line vty 0 4
> ~ login
> ~!
> ~end
> ~
> ~---------------------------
> ~
> ~Router 5:
> ~
> ~!
> ~version 12.0
> ~service timestamps debug uptime
> ~service timestamps log uptime
> ~no service password-encryption
> ~!
> ~hostname 2610B-R5
> ~!
> ~logging buffered 4096 debugging
> ~no logging console
> ~enable password cisco
> ~!
> ~username 2620D-R4 password 0 cisco
> ~ip subnet-zero
> ~no ip domain-lookup
> ~ip domain-name toontown.local
> ~chat-script RESET "" "+++ATH\r" OK "ATZ" OK \c
> ~modemcap entry optima_v34:FD=&F:AA=S0=1:CD=&C1:DTR=&D2:HFL=&K1:NEC=E0
> ~!
> ~!
> ~interface Loopback0
> ~ ip address 55.55.55.55 255.255.255.0
> ~ no ip directed-broadcast
> ~ ip ospf network point-to-point
> ~!
> ~interface FastEthernet0/0
> ~ ip address 150.50.15.5 255.255.255.0
> ~ no ip directed-broadcast
> ~ no cdp enable
> ~!
> ~interface Serial0/0
> ~ no ip address
> ~ no ip directed-broadcast
> ~ no ip mroute-cache
> ~ shutdown
> ~ no fair-queue
> ~ no cdp enable
> ~!
> ~interface Serial0/1
> ~ ip address 150.50.57.5 255.255.255.0
> ~ no ip directed-broadcast
> ~ encapsulation ppp
> ~ clockrate 500000
> ~ no cdp enable
> ~!
> ~interface Async65
> ~ ip address 145.45.45.5 255.255.255.240
> ~ no ip directed-broadcast
> ~ encapsulation ppp
> ~ ip ospf network point-to-point
> ~ ip ospf cost 2000
> ~ ip ospf demand-circuit
> ~ dialer in-band
> ~ dialer idle-timeout 90
> ~ dialer fast-idle 45
> ~ dialer watch-disable 45
> ~ dialer watch-group 1
> ~ dialer map ip 150.50.24.0 name 2620D-R4 broadcast 100
> ~ dialer map ip 145.45.45.4 name 2620D-R4 broadcast 100
> ~ dialer-group 1
> ~ async default routing
> ~ async mode dedicated
> ~ no cdp enable
> ~ ppp callback request
> ~ ppp authentication chap
> ~!
> ~router ospf 1
> ~ router-id 55.55.55.55
> ~ network 55.55.55.0 0.0.0.255 area 0
> ~ network 145.45.45.0 0.0.0.255 area 1
> ~ network 150.50.15.0 0.0.0.255 area 0
> ~!
> ~ip classless
> ~!
> ~access-list 199 permit icmp any any
> ~dialer watch-list 1 ip 150.50.24.0 255.255.255.0
> ~dialer-list 1 protocol ip permit
> ~no cdp run
> ~banner motd ^C
> ~
> ~**** R5 - 2610B ****
> ~
> ~^C
> ~!
> ~line con 0
> ~ privilege level 15
> ~ transport input none
> ~line aux 0
> ~ modem InOut
> ~ modem autoconfigure type optima_v34
> ~ speed 115200
> ~line vty 0 4
> ~ login
> ~!
> ~no scheduler allocate
> ~end
> ~
> ~---------------------------
> ~
> ~show ip ospf database (R5 while up)
> ~
> ~
> ~2610B-R5#sh ip ospf data
> ~
> ~ OSPF Router with ID (55.55.55.55) (Process ID 1)
> ~
> ~
> ~ Router Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq#
> ~Checksum Link count
> ~11.11.11.11 11.11.11.11 1161 0x80000007 0x608F 2
> ~55.55.55.55 55.55.55.55 1004 0x80000008 0xDC1F 2
> ~
> ~ Net Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~150.50.15.1 11.11.11.11 1413 0x80000004 0xDE4A
> ~
> ~ Summary Net Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~22.22.22.0 11.11.11.11 899 0x80000004 0xA9E0
> ~22.22.22.0 55.55.55.55 18 0x80000001 0xE81C
> ~44.44.44.0 11.11.11.11 900 0x80000004 0x11F6
> ~44.44.44.0 55.55.55.55 18 0x80000001 0x4CB6
> ~145.45.45.0 11.11.11.11 27 0x80000001 0xDBFF
> ~145.45.45.0 55.55.55.55 28 0x80000001 0xAA01
> ~150.50.12.0 11.11.11.11 1164 0x80000004 0x36C2
> ~150.50.12.0 55.55.55.55 19 0x80000001 0xF73B
> ~150.50.24.0 11.11.11.11 901 0x80000004 0x3478
> ~150.50.24.0 55.55.55.55 19 0x80000001 0xF076
> ~
> ~ Router Link States (Area 1)
> ~
> ~Link ID ADV Router Age Seq#
> ~Checksum Link count
> ~11.11.11.11 11.11.11.11 124 (DNA) 0x80000006 0x7AC8 2
> ~22.22.22.22 22.22.22.22 425 (DNA) 0x80000009 0x9A13 5
> ~44.44.44.44 44.44.44.44 5 (DNA) 0x8000001B 0x57A6 5
> ~55.55.55.55 55.55.55.55 29 0x80000018 0x66BE 2
> ~
> ~ Summary Net Link States (Area 1)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~11.11.11.0 11.11.11.11 124 (DNA) 0x80000005 0xB238
> ~11.11.11.0 55.55.55.55 752 0x80000004 0xEB45
> ~55.55.55.0 11.11.11.11 124 (DNA) 0x80000005 0x86DE
> ~55.55.55.0 55.55.55.55 753 0x80000004 0x5165
> ~150.50.15.0 11.11.11.11 124 (DNA) 0x80000005 0x9A99
> ~150.50.15.0 55.55.55.55 753 0x80000004 0xC9B1
> ~
> ~---------------------------
> ~
> ~show ip ospf data (R5 while down)
> ~
> ~
> ~2610B-R5#show ip ospf data
> ~
> ~ OSPF Router with ID (55.55.55.55) (Process ID 1)
> ~
> ~
> ~ Router Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq#
> ~Checksum Link count
> ~11.11.11.11 11.11.11.11 1270 0x80000007 0x608F 2
> ~55.55.55.55 55.55.55.55 1113 0x80000008 0xDC1F 2
> ~
> ~ Net Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~150.50.15.1 11.11.11.11 1522 0x80000004 0xDE4A
> ~
> ~ Summary Net Link States (Area 0)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~22.22.22.0 11.11.11.11 1008 0x80000004 0xA9E0
> ~44.44.44.0 11.11.11.11 1008 0x80000004 0x11F6
> ~150.50.12.0 11.11.11.11 1270 0x80000004 0x36C2
> ~150.50.24.0 11.11.11.11 1008 0x80000004 0x3478
> ~
> ~ Router Link States (Area 1)
> ~
> ~Link ID ADV Router Age Seq#
> ~Checksum Link count
> ~11.11.11.11 11.11.11.11 124 (DNA) 0x80000006 0x7AC8 2
> ~22.22.22.22 22.22.22.22 425 (DNA) 0x80000009 0x9A13 5
> ~44.44.44.44 44.44.44.44 5 (DNA) 0x8000001B 0x57A6 5
> ~55.55.55.55 55.55.55.55 18 0x80000019 0xC64 0
> ~
> ~ Summary Net Link States (Area 1)
> ~
> ~Link ID ADV Router Age Seq# Checksum
> ~11.11.11.0 11.11.11.11 124 (DNA) 0x80000005 0xB238
> ~11.11.11.0 55.55.55.55 860 0x80000004 0xEB45
> ~22.22.22.0 55.55.55.55 14 0x80000001 0xE6EB
> ~44.44.44.0 55.55.55.55 14 0x80000001 0x4E02
> ~55.55.55.0 11.11.11.11 124 (DNA) 0x80000005 0x86DE
> ~55.55.55.0 55.55.55.55 860 0x80000004 0x5165
> ~150.50.12.0 55.55.55.55 14 0x80000001 0x73CD
> ~150.50.15.0 11.11.11.11 124 (DNA) 0x80000005 0x9A99
> ~150.50.15.0 55.55.55.55 860 0x80000004 0xC9B1
> ~150.50.24.0 55.55.55.55 14 0x80000001 0x7183
> ~2610B-R5#
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