From: Lupi, Guy (Guy.Lupi@xxxxxxxxxxxxx)
Date: Sat Mar 30 2002 - 22:43:08 GMT-3
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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