Hi, Normally, we cannot configure /32 IP on the PPP multilink. Atlease /31 need to configure. But if use ip unnumber to loopback interface which has /32 IP, then this PPP multilink interface will get the /32 IP. Let say R1 loopback is 1.1.1.1/32 and R2 loopback is 3.3.3.3/32 , R1 and R2 between is Multilink ppp. These 2 IP can ping each other. In the routing table, it show as connected route.
Gateway of last resort is not set 1.0.0.0/32 is subnetted, 1 subnets C 1.1.1.1 is directly connected, Loopback1 3.0.0.0/32 is subnetted, 1 subnets C 3.3.3.3 is directly connected, Multilink1 This is the debug logs *Mar 1 01:23:48.159: Vi1 MLP: O ppp IP (0021) size 106 encsize 6 *Mar 1 01:23:48.159: Vi1 MLP: O data 1871 03CF 0021 4500 0064 008A 0000 FF01 *Mar 1 01:23:48.195: Vi1 MLP: I ppp IP (0021) size 104 encsize 4 *Mar 1 01:23:48.199: Vi1 MLP: I data FF03 0021 4500 0064 008B 0000 FF01 B306 *Mar 1 01:23:48.203: ICMP: echo reply sent, src 1.1.1.1, dst 3.3.3.3 *Mar 1 01:23:48.203: Vi1 MLP: O ppp IP (0021) size 106 encsize 6 *Mar 1 01:23:48.203: Vi1 MLP: O data 1871 03CF 0021 4500 0064 008B 0000 FF01 In workbooks, most of the examples are used /24, /30, /31 all same subnets. Not different subnet. I just want to know how these packets travel over multilink ppp. Regards,
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