SNMP in the IPv6 Context
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1 SNMP in the IPv6 Context Glenn Mansfield Keeni, Kazuhide Koide, Debasish Chakraborty, Norio Shiratori Cyber Solutions Inc. 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 1
2 Contents Introduction Network Monitoring and Multi-Protocol Issues Status Survey MIB investigation Solution: Development of IPv6 ready SNMP-agent Transport Proxy (SNMP Proxy between IPv4/IPv6) Access Control (Access Control based on IPv6-address) Application: Passive Monitor Agent that Collects IPv6 Traffic Information Visualization Conclusion 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 2
3 Issues of SNMP in IPv6 Network Ex.) Network Monitoring Environment using SNMP polling IPInOctets viewer manager SNMP/UDP/IP agent 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 3
4 Issues of SNMP in IPv6 Network P1:Transport issue manager SNMP/IP? agent 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 4
5 Issues of SNMP in IPv6 Network IPv6InOctets? viewer manager P2:MIB issue 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 5
6 The Multi-Protocol Issues: MIB definitions & Implementations MIB data structure supports IPv6 Number of IPv6 Packets, Octets Metric of an IPv6 route Today: RFC under construction <draft-ietf-ipv6-rfc2011-update-*.txt><draft-ietf-ipv6-rfc2012-update-*.txt> <draft-ietf-ipv6-rfc2012-update-*.txt><draft-ietf-ipv6-rfc2096-update-*.txt> Transport Definitions & Implementations Multi-protocol in transporting SNMP, proxy, access control IPv4/IPv6, TCP/UDP, SNMPv1/v2/v3 Today: RFC 3291(Textual Conventions for Internet Network Addresses) Implementation: net-snmp /01/28 Cyber Solutions Inc./Tohoku Univ. 6
7 Survey : MIBs using IP Address These MIBs need to update to support IPv6 (Focus on MIBs defined by RFC) MIB-II AppleTalk MIB BGPv3 MIB SNA APPN MIB BGP4-MIB SMDS-if MIB RIPv2-MIB OSPF-MIB MIP-MIB IP-MIB TCP-MIB UDP-MIB MIB name DNS Server MIB DNS Resolver MIB No. of OBJECTS IOPA-MIB ATM-MIB TN3270E-MIB IP Tunnel MIB DOCS-IF-MIB VRRP-MIB MIB name IP-FORWARD-MIB IPATM-IPMC-MIB RADIUS-AUTH-CLIENT-MIB RADIUS-AUTH-SERVER-MIB RADIUS-ACC-CLIENT-MIB RADIUS-ACC-SERVER-MIB DOCS-CABLE-DEVICE-MIB DISMAN-EXPRESSION-MIB No. of OBJECTS RMON2-MIB 5 NOTIFICATION-LOG-MIB /01/28 Cyber Solutions Inc./Tohoku Univ. 7 DOCS-BPI-MIB
8 MIBs using IPv6 Address IPv6Address RFC exists - Only MOs in MIB-II MIB-II, Forwarding MIB are under discussion <draft-ietf-ipv6-rfc2011-update-*.txt><draft-ietf-ipv6-rfc2012-update-*.txt> <draft-ietf-ipv6-rfc2012-update-*.txt><draft-ietf-ipv6-rfc2096-update-*.txt> Not sufficient MIB name IPV6-TCP-MIB Managed Object ipv6tcpconnlocaladdress ipv6tcpconnremaddress IPV6-UDP-MIB ipv6udplocaladdress IPV6-MIB ipv6addraddress ipv6routedest ipv6routenexthop ipv6nettomedianetaddress 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 8
9 Solution : transport issues Development of IPv6 ready SNMP-agent Design of IPv6 ready SNMP-agent RFC 3291 (Textual Conventions for Internet Network Addresses) Deployment based on net-snmp-5.0pre1 Transport implementation Proxy implementation ACL implementation Merged into net-snmp(mainstream) The latest Ver. net-snmp IPv6 transport is available 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 9
10 Traffic Pattern of snmpwalk in IPv4/IPv6 [bytes] :IPv4 snmpwalk :IPv6 snmpwalk time[sec] Equipment : FreeBSD4.6(KAME) + net-snmp /01/28 Cyber Solutions Inc./Tohoku Univ. 10
![time[sec] Equipment : FreeBSD4.](/docs-images/41/5371215/images/page_10.jpg "6(KAME) + net-snmp5.0.")
11 Use of SNMP Proxy(IPv4/v6) Managing Equipment Manager IPv4 Network Proxy Agent IPv6 Network Manager Managing Equipment (agent) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 11
12 Use of Access control (ACL) in IPv6 IPv6 ready SNMP-agent 2001:200:1a0:ff00::c0a8:76/64 IPv6 Network 2001:200:1a0:ff00::/64 Segment A Allowed Network) 2001:200:1a0:ff00::c0a8:a01/64 IPv6Network 2001:200:1a0:ff01::/64 Segment B Denied Network) # sec.name source community com2sec mynetwork 2001:200:1a0:ff00::/64 RIGHT 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 12
13 Current status SNMP transport over IPv6 IPv4 IPv6 Transport Proxy Access Control based on IPv6 Address USM Authentication in IPv6 Environment USM Authentication/Privacy in IPv6 Environment VACM in IPv6 Environment Our Implementation 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 13
14 Application : IPv6 Network Monitoring In many existing IPv6 network: SNMP-functions of Equipments : insufficient Monitoring of IPv6 Network or Traffic by SNMP: Difficult Proposal RMON-type(add-on) passive monitoring agent 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 14
15 Passive Monitoring Strategy of Network Monitoring Sniffing link using Tapping Kit (Ex. RMON) Merits: Do NOT affect to Network Operation Capability to access details in each packet Capable of getting ANY(IPv4/IPv6) information Also capable of getting Application-layer Information Managing Equipment (Router, Host, Network) Agent Tapping Kit Passive Monitor 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 15
16 Multi-Protocol Passive Monitor Monitor tapping Feature: Any kind of Info. about packets {Packets, Octets} {IPv4, IPv6} {TCP,UDP,ICMP} {Application wise..} {VLAN1,VLAN2,..} Information provision in MIBs Remote Monitoring Multi-protocol Transport SNMP over IPv4/v6 SNMP v1/v2c/v3 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 16
17 Designing Probe - Backend Collecting Information of every packets pcap, filtering SNMP agent Probe tapping SNMP agent - Frontend Information Provision in MIB form Programmable MIB Multi-protocol Transport Implementation: pcap + net-snmp + new MIB 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 17
18 Agent(1-box) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 18
19 Agent(Tapping Kit(100baseTX) + PC) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 19
20 Tapping Kit(1000base-SX) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 20
21 Experiment Environment : JGN-IPv6(IPv6 test-bed) From Nov TOHOKU-HOKKAIDO NOC in Tohoku Univ. 6-sites are connected 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 21
22 Environment : JGN-IPv6 Tohoku-NOC JGN- IPv6 IPv4- cloud CISCO 7206 Summit 24 (3ffe:516:3010::/64) v4router v6router /26 3ffe:516:3010:10::/64 agent1 manager agent2 [mirrored traffic] agent3 :Tap Kit /24 3ffe:516:3005::/64 Iwamiza wa Sappor o Hachi nohe Iwate Sendai Aizu 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 22
23 Visualization 2002/Nov./9 JGN Symposium (MPEG traffic, Video Conference) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 23
24 Conclusion Status Survey: MIB Investigation Solutions: Transport: Proxy: ACL: Design and Implementation of IPv6 transport SNMP-agent Ready - lpv6 SNMP Proxy Ready - IPv6 Access Control Application: Multi-protocol Passive Monitor Capability to Monitor ANY Network Status: Prototype operation at JGN-IPv6 Tohoku-Hokkaido NOC 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 24
25 Future Works Implementation of IPv6-ready MIBs Programmable Monitoring Using Light-weight Multi-Protocol Passive Monitor Very Light RMON Easy Use For IPv6 Monitoring 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 25
26 Appendix A. Definition of SNMP over UDP/IPv4 Definition of TRANSPORT -- SNMPv2 over UDP over IPv4 snmpudpdomain OBJECT-IDENTITY STATUS current DESCRIPTION The SNMPv2 over UDP transport domain. The corresponding transport address is of the type SNMPUDPAddress. ::= { snmpdomains 1} SnmpUDPAddress ::= TEXTUAL-CONVENTION DISPLAY-HINT 1d.1d.1d.1d/2d STATUS current DESCRIPTION Represents a UDP address: octets contents encoding 1-4 IP-address network-byte order 5-6 UDP-port network-byte order SYNTAX OCTET STRING (SIZE(6)) J.Case, K. McCloghrie, M.Rose, S. Waldbusser, RFC1906, Transport Mapping for Version 2 of the Simple Network Management Protocol (SNMPv2) 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 26
27 Appendix B. Definition of SNMP over UDP/IPv6 Definition of TRANSPORT in IPv6 network transportdomainudpipv6 OBJECT-IDENTITY STATUS current DESCRIPTION "The UDP over IPv6 transport domain. The corresponding transport address is of type TransportAddressIPv6." ::= { transportdomains 2 } TransportAddressIPv6 ::= TEXTUAL-CONVENTION DISPLAY-HINT "0a[2x:2x:2x:2x:2x:2x:2x:2x]0a:2d" STATUS current DESCRIPTION "Represents a UDP/TCP/SCTP over IPv6 transport address: octets contents encoding 1-16 IPv6 address network-byte order port number network-byte order This textual convention SHOULD NOT be used directly in object definitions since it restricts addresses to a specific format. However, if it is used, it MAY be used either on its own or in conjunction with TransportAddressType or TransportDomain as a pair." SYNTAX OCTET STRING (SIZE (18)) M. Daniele, J. Schoenwaelder, Textual Conventions for Transport Address, draft-ietf-ops-taddress-mib-02.txt 2003/01/28 Cyber Solutions Inc./Tohoku Univ. 27
28 Appendix C. snmpd.conf for proxy # proxy to SNMP over IPv6 agent proxy -v1 -c COMMUNITY 2001:200:1a0:ff00::ffff.enterprise proxy -v2c -c COMMUNITY 2001:200:1a0:ff00::ffff.enterprise proxy -v3 -u user -l authnopriv -a MD5 -A AUTHPASS 2001:200:1a0:ff00::ffff.enterprise proxy -v3 -u user -l authpriv -a MD5 -A AUTHPASS -x DES -X PRIVPASS 2001:200:1a0:ff00::ffff.enterprise # proxy to SNMP over IPv4 agent proxy -v1 -c COMMUNITY enterprise proxy -v2c -c COMMUNITY enterprise proxy -v3 -u user -l authnopriv -a MD5 -A AUTHPASS enterprise proxy -v3 -u user -l authpriv -a MD5 -A AUTHPASS -x DES -X PRIVPASS enterprise /01/28 Cyber Solutions Inc./Tohoku Univ. 28
29 Appendix D. Programmable MIB # cpmonitorbe.conf preprocessor CGpMonitor: /01/28 Cyber Solutions Inc./Tohoku Univ. 29
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