From: Szeto Jeff (jytszeto@hotmail.com)
Date: Fri Sep 13 2002 - 11:58:35 GMT-3
Hi,
Thank you. You are right.
By adding "access 100 deny tcp any eq bgp" , the line stop flapping.
Is it saying that both router will use the tcp 179 port for communication
when building neighbour?
Jeff
>From: ying c <bf5tgh1@yahoo.com>
>To: jeff szeto <jytszeto@hotmail.com>
>Subject: Re: Help please, isdn flapping
>Date: Fri, 13 Sep 2002 07:34:53 -0700 (PDT)
>
>I'd try to add "no nei peer" on both isdn routers.
>Also add "access-list 100 deny tcp any eq bgp any",
>because the source is dialing from R3.
>
>--- jeff szeto <jytszeto@hotmail.com> wrote:
> > Hi Group,
> >
> > Help please. Isdn is flopping and I cannot solve it.
> >
> > R3 goes up and down. The debug shows that the dial
> > reason is R3 tries to reach
> > 172.16.4.4, which is not the two ends of the isdn..
> > This is the RID of R3's bgp peer. However, I have
> > deny bgp in the
> > dialer-list.
> > No routing protocol is used. I just use floating
> > static routes.
> >
> > The following is the related config, could someone
> > help me to solve it?
> >
> > Thank you in advance.
> >
> >
> > Jeff
> >
> >
> > R3
> > !
> > logging rate-limit console 10 except errors
> > !
> > username R5 password 0 cisco
> > !
> > interface Loopback0
> > ip address 172.16.3.3 255.255.255.0
> > !
> > interface BRI0
> > ip address 172.16.35.6 255.255.255.252
> > encapsulation ppp
> > dialer map ip 172.16.35.5 name R5 broadcast 1111
> > dialer map ip 172.16.35.5 name R5 broadcast 1113
> > dialer-group 1
> > isdn switch-type basic-5ess
> > isdn spid1 221112
> > isdn spid2 221114
> > ppp authentication chap
> > !
> > router bgp 1
> > bgp router-id 172.16.3.3
> > neighbor 172.16.4.4 remote-as 1
> > neighbor 172.16.4.4 update-source Loopback0
> > !
> > ip route 0.0.0.0 0.0.0.0 172.16.35.5 200
> >
> > access-list 100 deny ip any host 224.0.0.10
> > access-list 100 deny tcp any any eq bgp
> > access-list 100 deny eigrp any any
> > access-list 100 permit ip any any
> > dialer-list 1 protocol ip list 100
> >
> >
> >
> > R5
> >
> > username R3 password 0 cisco
> > !
> > interface Loopback0
> > ip address 172.16.5.5 255.255.255.0
> >
> > interface BRI0
> > ip address 172.16.35.5 255.255.255.252
> > encapsulation ppp
> > dialer map ip 172.16.35.6 name R3 broadcast 1112
> > dialer map ip 172.16.35.6 name R3 broadcast 1114
> > dialer-group 1
> > ppp authentication chap
> > !
> > router bgp 101
> > bgp router-id 172.16.5.5
> > neighbor 172.16.3.3 remote-as 1
> > neighbor 172.16.3.3 ebgp-multihop 255
> > neighbor 172.16.3.3 update-source Loopback0
> > neighbor 172.16.3.3 route-map as-comm in
> > !
> > ip route 172.16.30.0 255.255.255.0 172.16.35.6 200
> > !
> > access-list 100 deny ip any host 224.0.0.10
> > access-list 100 deny tcp any any eq bgp
> > access-list 100 deny eigrp any any
> > access-list 100 permit ip any any
> > dialer-list 1 protocol ip list 100
> >
> > R3#
> > *Mar 2 07:34:56: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 40 bytes, outgoing
> > int
> > eresting (list 100)
> > *Mar 2 07:34:56: BR0 DDR: Dialing cause ip
> > (s=172.16.3.3, d=172.16.4.4)
> > *Mar 2 07:34:56: BR0 DDR: Attempting to dial 1111
> > *Mar 2 07:34:57: %LINK-3-UPDOWN: Interface BRI0:1,
> > changed state to up
> > R3#
> > *Mar 2 07:34:57: BR0:1 DDR: dialer protocol up
> > R3#
> > *Mar 2 07:34:58: %LINEPROTO-5-UPDOWN: Line protocol
> > on Interface BRI0:1,
> > change
> > d state to up
> > R3#
> > *Mar 2 07:35:03: %ISDN-6-CONNECT: Interface BRI0:1
> > is now connected to 1111
> > R5
> > R3#
> > *Mar 2 07:35:06: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 40 bytes, outgoing
> > int
> > eresting (list 100)
> > R3#
> > *Mar 2 07:35:16: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 40 bytes, outgoing
> > int
> > eresting (list 100)
> > R3#
> > *Mar 2 07:36:57: %ISDN-6-DISCONNECT: Interface
> > BRI0:1 disconnected from 111
> > 1 R5, call lasted 119 seconds
> > *Mar 2 07:36:57: %LINK-3-UPDOWN: Interface BRI0:1,
> > changed state to down
> > R3#
> > *Mar 2 07:36:57: BR0:1 DDR: disconnecting call
> > R3#
> > *Mar 2 07:36:58: %LINEPROTO-5-UPDOWN: Line protocol
> > on Interface BRI0:1,
> > change
> > d state to down
> > R3#
> > *Mar 2 07:37:13: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 44 bytes, outgoing
> > int
> > eresting (list 100)
> > *Mar 2 07:37:13: BR0 DDR: Dialing cause ip
> > (s=172.16.3.3, d=172.16.4.4)
> > *Mar 2 07:37:13: BR0 DDR: Attempting to dial 1111
> > R3#
> > *Mar 2 07:37:13: %LINK-3-UPDOWN: Interface BRI0:1,
> > changed state to up
> > R3#
> > *Mar 2 07:37:15: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 40 bytes, outgoing
> > int
> > eresting (list 100)
> > *Mar 2 07:37:15: BR0 DDR: ip (s=172.16.3.3,
> > d=172.16.4.4), 44 bytes, outgoing
> > int
> > eresting (list 100)
> > *Mar 2 07:37:15: BR0:1 DDR: dialer protocol up
> > R3#
> > *Mar 2 07:37:16: %LINEPROTO-5-UPDOWN: Line protocol
> > on Interface BRI0:1,
> > change
> > d state to up
> > R3#
> >
> > R3#sh dialer
> >
> > BRI0 - dialer type = ISDN
> >
> > Dial String Successes Failures Last DNIS
> > Last status
> > 1113 0 0 never
> > -
> > 1111 4 0 00:00:39
> > successful
> > 0 incoming call(s) have been screened.
> > 0 incoming call(s) rejected for callback.
> >
> > BRI0:1 - dialer type = ISDN
> > Idle timer (120 secs), Fast idle timer (20 secs)
> > Wait for carrier (30 secs), Re-enable (15 secs)
> > Dialer state is data link layer up
> > Dial reason: ip (s=172.16.3.3, d=172.16.4.4)
> > Time until disconnect 94 secs
> > Connected to 1111 (R5)
> >
> > BRI0:2 - dialer type = ISDN
> > Idle timer (120 secs), Fast idle timer (20 secs)
> > Wait for carrier (30 secs), Re-enable (15 secs)
> > Dialer state is idle
> > R3#
> > R3#
> > R3#
>
>
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