From: Bob Smith (ccnet101@nmccentral.com)
Date: Thu Nov 04 2004 - 15:07:04 GMT-3
Just a thought, usually in flapping interfaces, its authentication issue...
----- Original Message -----
From: "venkat garigipati" <garigipati@yahoo.com>
To: <CCIELab@groupstudy.com>
Sent: Thursday, November 04, 2004 9:07 AM
Subject: Interface Virtual-Access3 Flapping
> hi,
>
> i need some help in debugging why my virtual-access3 i/f is flapping. I
created a dialer i/f between two ATMs(see below configs) and my BGP doesnt
comeup..Can someone help.
>
>
> LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3, changed
state to down
> 2d02h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3,
changed state to up
> 2d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3,
changed state to down
> 2d03h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3,
changed state to up
>
>
> On Rrt1:
> ======
>
> interface ATM5/0
> bandwidth 56
> no ip address
> delay 2000
> no atm ilmi-keepalive
> pvc 0/301
> broadcast
> encapsulation aal5snap
> protocol ppp dialer
> dialer pool-member 1
> !
> !
> interface Dialer1
> mtu 4470
> ip address 54.1.8.6 255.255.255.0
> ip nat outside
> ip router isis
> encapsulation ppp
> dialer pool 1
> no peer neighbor-route
> ppp authentication pap
> ppp chap refuse
> ppp pap sent-username r6 password 7 072C087F6D26
> isis circuit-type level-1
> !
>
>
> On Rtr2:
> ======
> interface ATM5/0.301 point-to-point
> pvc 0/301
> broadcast
> encapsulation aal5snap
> protocol ppp dialer
> dialer pool-member 1
> !
> interface Dialer1
> mtu 4470
> ip address 54.1.8.254 255.255.255.0
> ip router isis
> encapsulation ppp
> dialer pool 1
> no peer neighbor-route
> ppp authentication pap
> ppp pap sent-username r8_BB1 password 7 047822352C0E
> !
>
>
>
>
>
> Sh int on R1:
> =========
> r6(config-if)#do sh int atm5/0
> ATM5/0 is up, line protocol is up
> Hardware is TI1570 ATM
> MTU 4470 bytes, sub MTU 4470, BW 56 Kbit, DLY 20000 usec,
> reliability 255/255, txload 27/255, rxload 27/255
> Encapsulation ATM, loopback not set
> Encapsulation(s): AAL5 , PVC mode
> 2047 maximum active VCs, 1024 VCs per VP, 1 current VCCs
> VC Auto Creation Disabled.
> VC idle disconnect time: 300 seconds
> Last input never, output 00:00:08, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
>
> Virtual-Access3 is up, line protocol is up
> Hardware is Virtual Access interface
> MTU 4470 bytes, BW 56 Kbit, DLY 100000 usec,
> reliability 255/255, txload 31/255, rxload 31/255
> Encapsulation PPP, LCP Open
> Open: OSICP, CDPCP, IPCP
> PPPoATM vaccess, cloned from Dialer1
> Bound to ATM5/0 VCD: 1, VPI: 0, VCI: 301, loopback not set
> DTR is pulsed for 5 seconds on reset
> Interface is bound to Di1 (Encapsulation PPP)
>
>
>
>
>
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