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  • 1.  Cisco ASR XVR to Juniper vMX - ISIS Adjacency

    Posted 08-26-2022 15:46
    Hey guys,

    I'm hoping to get some help here.   I've trying to lab up an IS-IS adjacency between a Juniper vMX and a Cisco ASR xVR.   I have the  connection configured between the two as level 2 only.  From everything I can see, it looks like they should be working.   


    This is what I'm seeing in the Juniper ISIS-Debug:

    Aug 26 17:02:51.237902 interface ae220.0 is up ,update all BFD interfaces adjacency for IPV6
    Aug 26 17:02:51.237977 Sending PTP IIH (len:1492) on ae220.0
    Aug 26 17:02:51.237989 max area 0, circuit type l2
    Aug 26 17:02:51.237998 ptp adjacency tlv length 5
    Aug 26 17:02:51.238007 neighbor state down
    Aug 26 17:02:51.238016 our extended local circuit id 331
    Aug 26 17:02:51.238025 speaks IP
    Aug 26 17:02:51.238033 speaks IPv6
    Aug 26 17:02:51.238057 IP address 10.192.192.51
    Aug 26 17:02:51.238090 IPv6 Global Interface address 2603:d004:4200:1d:8:20:2:3
    Aug 26 17:02:51.238117 IPv6 address fe80::8:20:2:3
    Aug 26 17:02:51.238130 area address 30.0000 (3)
    Aug 26 17:02:51.238141 restart RR reset RA reset holdtime 0
    Aug 26 17:02:51.238151 packet length 84
    Aug 26 17:02:51.238713 ISIS programmed L2 periodic xmit to 09:00:2b:00:00:05 interface ae220.0, interval 9 secs 0 nsecs
    Aug 26 17:02:55.249666 L1 Adjhold 15s ago, lsps 0, not started, active, adjs up 0, stabletime 0s
    Aug 26 17:02:55.249792 first adj not up, first adj not down, first adj uptime 0s, network not stable
    Aug 26 17:02:55.249812 L2 Adjhold 15s ago, lsps 0, not started, active, adjs up 0, stabletime 0s
    Aug 26 17:02:55.249822 first adj not up, first adj not down, first adj uptime 0s, network not stable
    Aug 26 17:02:59.335890 ISIS L2 periodic xmit to 09:00:2b:00:00:05 interface ae220.0
    Aug 26 17:03:00.249661 L1 Adjhold 20s ago, lsps 0, not started, active, adjs up 0, stabletime 0s
    Aug 26 17:03:00.249761 first adj not up, first adj not down, first adj uptime 0s, network not stable
    Aug 26 17:03:00.249773 L1 Adjhold, Network appears stable
    Aug 26 17:03:00.249795 L2 Adjhold 20s ago, lsps 0, not started, active, adjs up 0, stabletime 0s
    Aug 26 17:03:00.249806 first adj not up, first adj not down, first adj uptime 0s, network not stable
    Aug 26 17:03:00.249814 L2 Adjhold, Network appears stable
    Aug 26 17:03:00.249825 Adjhold, Clearing adjacency suppression on all interfaces
    Aug 26 17:03:00.249931 Sending PTP IIH (len:1492) on ae220.0
    Aug 26 17:03:00.249944 max area 0, circuit type l2
    Aug 26 17:03:00.249953 ptp adjacency tlv length 5
    Aug 26 17:03:00.249962 neighbor state down
    Aug 26 17:03:00.249971 our extended local circuit id 331
    Aug 26 17:03:00.249979 speaks IP
    Aug 26 17:03:00.249987 speaks IPv6
    Aug 26 17:03:00.250025 IP address 10.192.192.51
    Aug 26 17:03:00.250058 IPv6 Global Interface address 2603:d004:4200:1d:8:20:2:3
    Aug 26 17:03:00.250086 IPv6 address fe80::8:20:2:3
    Aug 26 17:03:00.250099 area address 30.0000 (3)
    Aug 26 17:03:00.250109 restart RR reset RA reset holdtime 0
    Aug 26 17:03:00.250120 packet length 84
    Aug 26 17:03:00.250583 ISIS programmed L2 periodic xmit to 09:00:2b:00:00:05 interface ae220.0, interval 9 secs 0 nsecs

    On the Cisco, I'm seeing the following:

    Aug 26 17:10:53.213 isis/default/hlo 0/RP0/CPU0 t8473   isis_osi_adj_process_iih:6535                          ADJ_RECV_P2P_DETAILS L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:10:53.213 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_3way_validate:4782                   ADJ_RECV_P2P_3WAY_IETF_ACCEPT_MISSING L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:10:53.213 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_state:5197                           ADJ_RECV_P2P_STATE_HANDSHAKE L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:10:53.213 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_update:4378                              ADJ_HOLDTIME_SET L2 BE222 0691.7412.8139 27
    Aug 26 17:11:01.424 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_input_packet:545                               IO_PDU_INPUT L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:01.424 isis/default/hlo 0/RP0/CPU0 t8473   isis_osi_adj_process_iih:6535                          ADJ_RECV_P2P_DETAILS L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:01.424 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_3way_validate:4782                   ADJ_RECV_P2P_3WAY_IETF_ACCEPT_MISSING L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:01.424 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_state:5197                           ADJ_RECV_P2P_STATE_HANDSHAKE L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:01.424 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_update:4378                              ADJ_HOLDTIME_SET L2 BE222 0691.7412.8139 27
    Aug 26 17:11:01.575 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1113                            ADJ_SEND_P2P_DO_IETF_3WAY BE222 L2
    Aug 26 17:11:01.575 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1176                            ADJ_SEND_P2P_ADD_SA BE222 L2
    Aug 26 17:11:01.575 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1317                            ADJ_SEND_P2P_DETAILS BE222 L2 30 9195
    Aug 26 17:11:01.575 isis/default/hlo 0/RP0/CPU0 t8473   isis_output_iov:184                                    IO_PDU_OUTPUT P2P IIH BE222 0900.2b00.0005
    Aug 26 17:11:01.575 isis/default/hlo 0/RP0/CPU0 t8473  isis_sched_p2p_hello:1946                               ADJ_SCHED_P2P_SCHEDULE BE222 L2
    Aug 26 17:11:09.001 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_input_packet:545                               IO_PDU_INPUT L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:09.001 isis/default/hlo 0/RP0/CPU0 t8473   isis_osi_adj_process_iih:6535                          ADJ_RECV_P2P_DETAILS L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:09.001 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_3way_validate:4782                   ADJ_RECV_P2P_3WAY_IETF_ACCEPT_MISSING L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:09.001 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_p2p_state:5197                           ADJ_RECV_P2P_STATE_HANDSHAKE L2 BE222 2c6b.f5b2.e7c2 P2P IIH
    Aug 26 17:11:09.001 isis/default/hlo 0/RP0/CPU0 t8473    isis_osi_adj_update:4378                              ADJ_HOLDTIME_SET L2 BE222 0691.7412.8139 27
    Aug 26 17:11:09.434 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1113                            ADJ_SEND_P2P_DO_IETF_3WAY BE222 L2
    Aug 26 17:11:09.434 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1176                            ADJ_SEND_P2P_ADD_SA BE222 L2
    Aug 26 17:11:09.434 isis/default/hlo 0/RP0/CPU0 t8473  isis_osi_send_p2p_hello:1317                            ADJ_SEND_P2P_DETAILS BE222 L2 30 9195
    Aug 26 17:11:09.434 isis/default/hlo 0/RP0/CPU0 t8473   isis_output_iov:184                                    IO_PDU_OUTPUT P2P IIH BE222 0900.2b00.0005
    Aug 26 17:11:09.434 isis/default/hlo 0/RP0/CPU0 t8473  isis_sched_p2p_hello:1946                               ADJ_SCHED_P2P_SCHEDULE BE222 L2​

    I see the "ADJ_RECV_P2P_3WAY_IETF_ACCEPT_MISSING L2 BE222 2c6b.f5b2.e7c2 P2P IIH" message.   I'm not sure if that is the problem or not.

    Anyone have some suggestions I might be able to try?

    Thanks
    Chuck



    ------------------------------
    CHARLES MAYES
    ------------------------------


  • 2.  RE: Cisco ASR XVR to Juniper vMX - ISIS Adjacency

    Posted 08-27-2022 04:13
    Hi,

    Please share the ISIS configuration from both routers. Also,  "show isis interface detail"; "show isis adjacency detail" from vMX and "show clns interface" from Cisco router will be helpful.

    Regards
    Sheetanshu

    ------------------------------
    Sheetanshu Shekhar
    ------------------------------



  • 3.  RE: Cisco ASR XVR to Juniper vMX - ISIS Adjacency

    Posted 08-27-2022 16:18
    seams is an issue related to hello padding, could you pls:

    1- share your config from both devices
    2- share the "show interface ae220 extensive" from the MX and show interface be222 from the ASR9K

    if im correct, basically you could exclude the hello-padding from the interface

    regards

    ------------------------------
    LUIS W FLOR GONZA
    ------------------------------



  • 4.  RE: Cisco ASR XVR to Juniper vMX - ISIS Adjacency

    Posted 08-29-2022 05:14
    You were absolutely right.  As soon as I disabled the Hello padding the interface came right up.  

    Thank you SO much for pointing me in the right direction! :)

    On Cisco it's "hello-padding" disable under the ISIS Interface configuration.

    Thank you again!
    Chuck

    ------------------------------
    CHARLES MAYES
    ------------------------------



  • 5.  RE: Cisco ASR XVR to Juniper vMX - ISIS Adjacency

    Posted 08-29-2022 10:16
    Hi Charles, if my comment was helpfull pls recommend it :D

    ------------------------------
    LUIS W FLOR GONZA
    ------------------------------