From: gladston@br.ibm.com
Date: Sat Jul 16 2005 - 21:57:03 GMT-3
Hi,
Do you know what can go wrong if configuring ppp multilink only on the logical interface?
I have seen notes saying to configure ppp multilink on the physical and logical interface.
(for example:http://www.cisco.com/warp/public/131/mppp-ddr.html#topic3)
But trying to see what happens if not configuring it on the physical, I could not note any difference.
Rack2R2#sh ppp mul
Dialer25, bundle name is Rack2R4
Bundle up for 00:05:06, 51/255 load
Receive buffer limit 24384 bytes, frag timeout 1524 ms
0/0 fragments/bytes in reassembly list
0 lost fragments, 0 reordered
0/0 discarded fragments/bytes, 0 lost received
0x2D3A received sequence, 0x2D3A sent sequence
Member links: 2 (max not set, min not set)
BR3/0:1, since 00:05:05
BR3/0:2, since 00:04:33
Rack2R2#sh int di 25
Dialer25 is up, line protocol is up (spoofing)
Hardware is Unknown
Internet address is 148.5.24.2/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
reliability 255/255, txload 23/255, rxload 23/255
Encapsulation PPP, LCP Open, multilink Open
Rack2R4#sh ppp mul
Dialer25, bundle name is Rack2R2
Bundle up for 00:01:48, 1/255 load
Receive buffer limit 24384 bytes, frag timeout 1524 ms
0/0 fragments/bytes in reassembly list
0 lost fragments, 0 reordered
0/0 discarded fragments/bytes, 0 lost received
0xA received sequence, 0xA sent sequence
Member links: 2 (max not set, min not set)
BR3/0:1, since 00:01:47
BR3/0:2, since 00:01:15
Rack2R4#sh int di 25
Dialer25 is up, line protocol is up (spoofing)
Hardware is Unknown
Internet address is 148.5.24.4/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
reliability 255/255, txload 15/255, rxload 15/255
Encapsulation PPP, LCP Open, multilink Open
These are the configs (same on both routers):
Rack2R2#sh run int bri 3/0
Building configuration...
Current configuration : 131 bytes
!
interface BRI3/0
no ip address
encapsulation ppp
dialer pool-member 25
isdn switch-type basic-ni
isdn spid1 0835866101
end
Rack2R2#sh run int dia 25
Building configuration...
Current configuration : 254 bytes
!
interface Dialer25
ip address 148.5.24.2 255.255.255.0
encapsulation ppp
dialer pool 25
dialer remote-name Rack2R4
dialer string 8358662
dialer load-threshold 1 outbound
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink
end
Debug on R4 (router receiving the call) shows multilink is succesfull:
*Mar 1 02:10:16: BR3/0:2 LCP: I CONFREQ [Listen] id 11 len 29
*Mar 1 02:10:16: BR3/0:2 LCP: AuthProto CHAP (0x0305C22305)
*Mar 1 02:10:16: BR3/0:2 LCP: MagicNumber 0x0331D5FA (0x05060331D5FA)
*Mar 1 02:10:16: BR3/0:2 LCP: MRRU 1524 (0x110405F4)
*Mar 1 02:10:16: BR3/0:2 LCP: EndpointDisc 1 Rack2R2 (0x130A015261636B325232)
*Mar 1 02:10:16: BR3/0:2 PPP: Authorization required
*Mar 1 02:10:16: BR3/0:2 LCP: O CONFREQ [Listen] id 32 len 29
*Mar 1 02:10:16: BR3/0:2 LCP: AuthProto CHAP (0x0305C22305)
*Mar 1 02:10:16: BR3/0:2 LCP: MagicNumber 0x01BA01C5 (0x050601BA01C5)
*Mar 1 02:10:16: BR3/0:2 LCP: MRRU 1524 (0x110405F4)
*Mar 1 02:10:16: BR3/0:2 LCP: EndpointDisc 1 Rack2R4 (0x130A015261636B325234)
*Mar 1 02:10:16: BR3/0:2 LCP: O CONFACK [Listen] id 11 len 29
*Mar 1 02:10:16: BR3/0:2 LCP: AuthProto CHAP (0x0305C22305)
*Mar 1 02:10:16: BR3/0:2 LCP: MagicNumber 0x0331D5FA (0x05060331D5FA)
*Mar 1 02:10:16: BR3/0:2 LCP: MRRU 1524 (0x110405F4)
*Mar 1 02:10:16: BR3/0:2 LCP: EndpointDisc 1 Rack2R2 (0x130A015261636B325232)
*Mar 1 02:10:16: BR3/0:2 LCP: I CONFACK [ACKsent] id 32 len 29
*Mar 1 02:10:16: BR3/0:2 LCP: AuthProto CHAP (0x0305C22305)
*Mar 1 02:10:16: BR3/0:2 LCP: MagicNumber 0x01BA01C5 (0x050601BA01C5)
*Mar 1 02:10:16: BR3/0:2 LCP: MRRU 1524 (0x110405F4)
*Mar 1 02:10:16: BR3/0:2 LCP: EndpointDisc 1 Rack2R4 (0x130A015261636B325234)
*Mar 1 02:10:16: BR3/0:2 LCP: State is Open
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is AUTHENTICATING, by both
*Mar 1 02:10:16: BR3/0:2 CHAP: O CHALLENGE id 24 len 28 from "Rack2R4"
*Mar 1 02:10:16: BR3/0:2 CHAP: I CHALLENGE id 25 len 28 from "Rack2R2"
*Mar 1 02:10:16: BR3/0:2 CHAP: Waiting for Peer to authenticate first
*Mar 1 02:10:16: BR3/0:2 CHAP: I RESPONSE id 24 len 28 from "Rack2R2"
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is FORWARDING, Attempting Forward
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is AUTHENTICATING, Unauthenticated User
*Mar 1 02:10:16: BR3/0:2 PPP: Sent CHAP LOGIN Request
*Mar 1 02:10:16: BR3/0:2 PPP: Received LOGIN Response PASS
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is FORWARDING, Attempting Forward
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is AUTHENTICATING, Authenticated User
*Mar 1 02:10:16: BR3/0:2 PPP: Sent LCP AUTHOR Request
*Mar 1 02:10:16: BR3/0:2 CHAP: Using hostname from unknown source
*Mar 1 02:10:16: BR3/0:2 CHAP: Using password from AAA
*Mar 1 02:10:16: BR3/0:2 CHAP: O RESPONSE id 25 len 28 from "Rack2R4"
*Mar 1 02:10:16: BR3/0:2 LCP: Received AAA AUTHOR Response PASS
*Mar 1 02:10:16: BR3/0:2 CHAP: O SUCCESS id 24 len 4
*Mar 1 02:10:16: BR3/0:2 CHAP: I SUCCESS id 25 len 4
*Mar 1 02:10:16: BR3/0:2 PPP: Phase is VIRTUALIZED
*Mar 1 02:10:16: Di25 MLP: Added link BR3/0:2 to bundle Rack2R2
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