マルチキャリア対応 SIM を使用した LTE 接続設定

MA-S1xx v5.4.0, MA-E3xx v5.3.0, MA-X3xx v6.0.0 から、マルチキャリア対応 SIM (SORACOM planX1, planX3 など) での自動キャリア変更機能に対応しました。

[参考] マルチキャリアに対応する SIM のキャリア切り替えの実装例 - SORACOM 公式ブログ

WebUI にメインとして使用するキャリアと、バックアップに使用するキャリア 2 つの PLMN を設定します。

※ キャリア切替のトリガーとして使用する、ICMP による Peer ¹⁾への疎通確認機能は強制的に有効化されます。

疎通確認²⁾ NG が 3 回連続すると、PPP 接続を切断してメイン回線からバックアップ回線への切替が行われます。

※ 意図的に疎通確認 NG を発生させるため、今回は PPP 接続完了後に iptables で ppp0 からのパケットを落とす設定をしています。

• PPP 受信パケットを全部落とす

iptables -I INPUT -i ppp0 -j DROP

• 上記フィルター設定を消して元に戻す

iptables -D INPUT 1

Nov  2 09:08:04 gemini systemd[1]: Starting PPP Manager...
Nov  2 09:08:04 gemini systemd[1]: Started PPP Manager.
Nov  2 09:08:04 gemini PPP Manager[814]: Started.
Nov  2 09:08:04 gemini PPP Manager[814]: Wait for device: /dev/ttyAML0 ...
Nov  2 09:08:04 gemini PPP Manager[814]: LTE module found, check config/status.
Nov  2 09:08:04 gemini PPP Manager[814]: SIM is ready.
Nov  2 09:08:04 gemini PPP Manager[814]: Use Primary(Single) PLMN: 44020 <------- Softbank で接続
Nov  2 09:08:04 gemini PPP Manager[814]: Current CarrierID: 4 (SIM Free)
Nov  2 09:08:04 gemini PPP Manager[814]: Detached from current Network.
Nov  2 09:08:04 gemini PPP Manager[814]: PLMN set to 44020, wait (max 30 seconds)...
Nov  2 09:08:10 gemini PPP Manager[814]: Set PLMN[44020]: succeeded.
Nov  2 09:08:10 gemini PPP Manager[814]: No need to set PDP Context (Same APN: soracom.io).
Nov  2 09:08:10 gemini pppd[815]: pppd 2.4.7 started by root, uid 0
Nov  2 09:08:11 gemini chat_ng[817]: LTE Module: AML574
Nov  2 09:08:11 gemini chat_ng[817]: Module Firmware: 14-12.
Nov  2 09:08:11 gemini chat_ng[817]: SIM is Ready.
Nov  2 09:08:11 gemini chat_ng[817]: SIM IMSI: 29510xxxxxxxxxx.
Nov  2 09:08:11 gemini chat_ng[817]: Antenna Level: RSSI: -55.0 [dBm] (Level: 3)
Nov  2 09:08:11 gemini chat_ng[817]: Wait for attaching to LTE Network...
Nov  2 09:08:11 gemini chat_ng[817]: Attached to LTE Network? Yes
Nov  2 09:08:11 gemini chat_ng[817]: Start dialing...
Nov  2 09:08:11 gemini chat_ng[817]: Connected.
Nov  2 09:08:12 gemini pppd[815]: Script /usr/local/sbin/chat_ng -n -f /etc/default/ppp finished (pid 816), status = 0x0
Nov  2 09:08:12 gemini pppd[815]: Serial connection established.
Nov  2 09:08:12 gemini pppd[815]: using channel 1
Nov  2 09:08:12 gemini pppd[815]: Using interface ppp0
Nov  2 09:08:12 gemini pppd[815]: Connect: ppp0 <--> /dev/ttyAML0
Nov  2 09:08:13 gemini pppd[815]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x8e1b327a> <pcomp> <accomp>]
Nov  2 09:08:13 gemini pppd[815]: rcvd [LCP ConfReq id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0x7555412d> <pcomp> <accomp>]
Nov  2 09:08:13 gemini pppd[815]: sent [LCP ConfAck id=0x0 <asyncmap 0x0> <auth chap MD5> <magic 0x7555412d> <pcomp> <accomp>]
Nov  2 09:08:13 gemini pppd[815]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x8e1b327a> <pcomp> <accomp>]
Nov  2 09:08:13 gemini pppd[815]: sent [LCP EchoReq id=0x0 magic=0x8e1b327a]
Nov  2 09:08:13 gemini pppd[815]: rcvd [LCP DiscReq id=0x1 magic=0x7555412d]
Nov  2 09:08:13 gemini pppd[815]: rcvd [CHAP Challenge id=0x1 <98343e1d263eb715bbb18a65b3f56ae6>, name = "UMTS_CHAP_SRVR"]
Nov  2 09:08:13 gemini pppd[815]: sent [CHAP Response id=0x1 <61151b4f63cd6af175331dba7e6ad1af>, name = "sora"]
Nov  2 09:08:13 gemini pppd[815]: rcvd [LCP EchoRep id=0x0 magic=0x7555412d 8e 1b 32 7a]
Nov  2 09:08:13 gemini pppd[815]: rcvd [CHAP Success id=0x1 ""]
Nov  2 09:08:13 gemini pppd[815]: CHAP authentication succeeded
Nov  2 09:08:13 gemini pppd[815]: CHAP authentication succeeded
Nov  2 09:08:13 gemini pppd[815]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Nov  2 09:08:13 gemini pppd[815]: rcvd [IPCP ConfReq id=0x0]
Nov  2 09:08:13 gemini pppd[815]: sent [IPCP ConfNak id=0x0 <addr 0.0.0.0>]
Nov  2 09:08:13 gemini pppd[815]: rcvd [IPCP ConfNak id=0x1 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:08:13 gemini pppd[815]: sent [IPCP ConfReq id=0x2 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:08:13 gemini pppd[815]: rcvd [IPCP ConfReq id=0x1]
Nov  2 09:08:13 gemini pppd[815]: sent [IPCP ConfAck id=0x1]
Nov  2 09:08:13 gemini pppd[815]: rcvd [IPCP ConfAck id=0x2 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:08:13 gemini pppd[815]: Could not determine remote IP address: defaulting to 10.64.64.64
Nov  2 09:08:13 gemini PPP Manager[814]: PPP connected.
Nov  2 09:08:13 gemini pppd[815]: replacing old default route to eth0 [172.16.1.60]
Nov  2 09:08:13 gemini pppd[815]: local  IP address 10.173.122.34
Nov  2 09:08:13 gemini pppd[815]: remote IP address 10.64.64.64
Nov  2 09:08:13 gemini pppd[815]: primary   DNS address 100.127.0.53
Nov  2 09:08:13 gemini pppd[815]: secondary DNS address 100.127.1.53
Nov  2 09:08:13 gemini pppd[815]: Script /etc/ppp/ip-up started (pid 822)
Nov  2 09:08:14 gemini pppd[815]: Script /etc/ppp/ip-up finished (pid 822), status = 0x0
Nov  2 09:08:15 gemini ntpd[537]: Listen normally on 6 ppp0 10.173.122.34:123
Nov  2 09:08:15 gemini ntpd[537]: new interface(s) found: waking up resolver

Nov  2 09:08:44 gemini PPP Manager[814]: LTE next-hop address: 54.150.128.67 <--- これは疎通確認 OK
Nov  2 09:09:16 gemini PPP Manager[814]: ! LTE peer not responding, count: 1
Nov  2 09:09:48 gemini PPP Manager[814]: ! LTE peer not responding, count: 2
Nov  2 09:10:20 gemini PPP Manager[814]: ! LTE peer not responding, count: 3

Nov  2 09:10:20 gemini PPP Manager[814]: Wait holdoff time, 5 [sec]
Nov  2 09:10:20 gemini pppd[815]: Terminating on signal 15
Nov  2 09:10:20 gemini pppd[815]: Connect time 2.2 minutes.
Nov  2 09:10:20 gemini pppd[815]: Sent 116 bytes, received 224 bytes.
Nov  2 09:10:20 gemini pppd[815]: restoring old default route to eth0 [172.16.1.60]
Nov  2 09:10:20 gemini pppd[815]: Script /etc/ppp/ip-down started (pid 912)
Nov  2 09:10:20 gemini pppd[815]: sent [LCP TermReq id=0x2 "User request"]
Nov  2 09:10:20 gemini pppd[815]: rcvd [LCP TermAck id=0x2]
Nov  2 09:10:20 gemini pppd[815]: Connection terminated.
Nov  2 09:10:21 gemini pppd[815]: Script /etc/ppp/ip-down finished (pid 912), status = 0x0
Nov  2 09:10:21 gemini pppd[815]: Exit.
Nov  2 09:10:22 gemini ntpd[537]: Deleting interface #6 ppp0, 10.173.122.34#123, interface stats: received=0, sent=0, dropped=0, active_time=127 secs

Nov  2 09:10:25 gemini PPP Manager[814]: SIM is ready.
Nov  2 09:10:25 gemini PPP Manager[814]: Use Secondary PLMN: 44051 <------------------ KDDI
Nov  2 09:10:25 gemini PPP Manager[814]: Current CarrierID: 4 (SIM Free)
Nov  2 09:10:25 gemini PPP Manager[814]: Detached from current Network.
Nov  2 09:10:25 gemini PPP Manager[814]: PLMN set to 44051, wait (max 30 seconds)...
Nov  2 09:10:31 gemini PPP Manager[814]: Set PLMN[44051]: succeeded.
Nov  2 09:10:31 gemini PPP Manager[814]: No need to set PDP Context (Same APN: soracom.io).
Nov  2 09:10:31 gemini pppd[980]: pppd 2.4.7 started by root, uid 0
Nov  2 09:10:32 gemini chat_ng[982]: LTE Module: AML574
Nov  2 09:10:32 gemini chat_ng[982]: Module Firmware: 14-12.
Nov  2 09:10:32 gemini chat_ng[982]: SIM is Ready.
Nov  2 09:10:32 gemini chat_ng[982]: SIM IMSI: 29510xxxxxxxxxx.
Nov  2 09:10:32 gemini chat_ng[982]: Antenna Level: RSSI: -71.0 [dBm] (Level: 3)
Nov  2 09:10:32 gemini chat_ng[982]: Wait for attaching to LTE Network...
Nov  2 09:10:32 gemini chat_ng[982]: Attached to LTE Network? Yes
Nov  2 09:10:32 gemini chat_ng[982]: Start dialing...
Nov  2 09:10:33 gemini chat_ng[982]: Connected.
Nov  2 09:10:34 gemini pppd[980]: Script /usr/local/sbin/chat_ng -n -f /etc/default/ppp finished (pid 981), status = 0x0
Nov  2 09:10:34 gemini pppd[980]: Serial connection established.
Nov  2 09:10:34 gemini pppd[980]: using channel 2
Nov  2 09:10:34 gemini pppd[980]: Using interface ppp0
Nov  2 09:10:34 gemini pppd[980]: Connect: ppp0 <--> /dev/ttyAML0
Nov  2 09:10:35 gemini pppd[980]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xffe5a45b> <pcomp> <accomp>]
Nov  2 09:10:35 gemini pppd[980]: rcvd [LCP ConfReq id=0x2 <asyncmap 0x0> <auth chap MD5> <magic 0x7557695a> <pcomp> <accomp>]
Nov  2 09:10:35 gemini pppd[980]: sent [LCP ConfAck id=0x2 <asyncmap 0x0> <auth chap MD5> <magic 0x7557695a> <pcomp> <accomp>]
Nov  2 09:10:35 gemini pppd[980]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xffe5a45b> <pcomp> <accomp>]
Nov  2 09:10:35 gemini pppd[980]: sent [LCP EchoReq id=0x0 magic=0xffe5a45b]
Nov  2 09:10:35 gemini pppd[980]: rcvd [LCP DiscReq id=0x3 magic=0x7557695a]
Nov  2 09:10:35 gemini pppd[980]: rcvd [CHAP Challenge id=0x1 <2b7ca633c55482de7d22115061c1e3b6>, name = "UMTS_CHAP_SRVR"]
Nov  2 09:10:35 gemini pppd[980]: sent [CHAP Response id=0x1 <1c97bc057c16a41ab99b290c9c0d52f6>, name = "sora"]
Nov  2 09:10:35 gemini pppd[980]: rcvd [LCP EchoRep id=0x0 magic=0x7557695a ff e5 a4 5b]
Nov  2 09:10:35 gemini pppd[980]: rcvd [CHAP Success id=0x1 ""]
Nov  2 09:10:35 gemini pppd[980]: CHAP authentication succeeded
Nov  2 09:10:35 gemini pppd[980]: CHAP authentication succeeded
Nov  2 09:10:35 gemini pppd[980]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Nov  2 09:10:35 gemini pppd[980]: rcvd [IPCP ConfReq id=0x2]
Nov  2 09:10:35 gemini pppd[980]: sent [IPCP ConfNak id=0x2 <addr 0.0.0.0>]
Nov  2 09:10:35 gemini pppd[980]: rcvd [IPCP ConfNak id=0x1 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:10:35 gemini pppd[980]: sent [IPCP ConfReq id=0x2 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:10:35 gemini pppd[980]: rcvd [IPCP ConfReq id=0x3]
Nov  2 09:10:35 gemini pppd[980]: sent [IPCP ConfAck id=0x3]
Nov  2 09:10:35 gemini pppd[980]: rcvd [IPCP ConfAck id=0x2 <addr 10.173.122.34> <ms-dns1 100.127.0.53> <ms-dns2 100.127.1.53>]
Nov  2 09:10:35 gemini pppd[980]: Could not determine remote IP address: defaulting to 10.64.64.64
Nov  2 09:10:35 gemini PPP Manager[814]: PPP connected.
Nov  2 09:10:35 gemini pppd[980]: replacing old default route to eth0 [172.16.1.60]
Nov  2 09:10:35 gemini pppd[980]: local  IP address 10.173.122.34
Nov  2 09:10:35 gemini pppd[980]: remote IP address 10.64.64.64
Nov  2 09:10:35 gemini pppd[980]: primary   DNS address 100.127.0.53
Nov  2 09:10:35 gemini pppd[980]: secondary DNS address 100.127.1.53
Nov  2 09:10:35 gemini pppd[980]: Script /etc/ppp/ip-up started (pid 991)
Nov  2 09:10:36 gemini pppd[980]: Script /etc/ppp/ip-up finished (pid 991), status = 0x0
Nov  2 09:10:36 gemini ntpd[537]: Listen normally on 7 ppp0 10.173.122.34:123
Nov  2 09:10:36 gemini ntpd[537]: new interface(s) found: waking up resolver