koniec wykładu I - tele.pw.edu.plmariusz/lectures/zst_wyklad5.pdf · Institute of...
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Transcript of koniec wykładu I - tele.pw.edu.plmariusz/lectures/zst_wyklad5.pdf · Institute of...
Institute of Telecommunications
MIB-2
LP3S3
S2
LP1 RA1LA1 RP1
LA2 LP2 RA2 RP2
LA3
S1
RA3 RP3
1.3.6.1.2.1.6.13.1.2.LA2.LP2.RA2.RP2
tcpConnTable OBJECT-TYPESYNTAX SEQUENCE OF
TcpConnEntryACCESS not-accessibleSTATUS current DESCRIPTION “”
::= { tcp 13 }
tcpConnEntry OBJECT-TYPESYNTAX TcpConnEntryACCESS not-accessibleSTATUS current DESCRIPTION “”INDEX { tcpConnLocalAddress,
tcpConnLocalPort,tcpConnRemAddress,tcpConnRemPort }
::= { tcpConnTable 1 }
...
(1)tcpConnEntry
tcpConnState (1)
tcpConnLocalAddress (2)
tcpConnLocalPort(3)
tcpConnRemAddress (4)
tcpConnRemPort (5)tcpInErrs OBJECT- TYPE
SYNTAX Counter ACCESS read-onlySTATUS current DESCRIPTION“”
::= { tcp 14 }
1.3.6.1.2.1.6.14.0
mib-2 (1) [1.3.6.1.2.1]
system (1)
interfaces (2)
at (3)
ip (4)
icmp (5)
tcp (6)
udp (7)
egp (8)
transmission (10)
snmp (11)
(14)
(13)
tcpRetransSeg (12)
tcpRtoAlgorithm (1)
tcpConnTable
tcpInErrs
tcpOutRsts (15)
Institute of Telecommunications
SMI - normalizacja
• SMIv1
• Structure and identification of management information for TCP/IP-based internets
• RFC 1065 – 1988, RFC 1155 – 1990
• Concise MIB definitions
• RFC 1212 – 1991
• Convention for defining traps for use with the SNMP
• RFC 1215 – 1991
• SMIv2
• Structure of Management Information for version 2 of the Simple Network Management Protocol (SNMPv2)
• RFC 1442 – 1993, RFC 1902 – 1996, RFC 2578 – 1999
• Textual Conventions for version 2 of the Simple Network Management Protocol (SNMPv2)
• RFC 1443 – 1993, RFC 1903 – 1996, RFC 2579 - 1999
Institute of Telecommunications
SMI – typy podstawowe
• Application-wide
• INTEGER (-2147483648..2147483647)
• OCTET STRING(size(0..65535))
• OBJECT IDENTIFIER
• Defined types
• Integer32 ::= INTEGER (-2147483648..2147483647)
• IpAddress ::= OCTET STRING (SIZE (4))
• Counter32 ::= INTEGER (0..4294967295)
• Gauge32 ::= INTEGER (0..4294967295)
• Unsigned32 ::= INTEGER (0..4294967295)
• TimeTicks ::= INTEGER (0..4294967295)
• Opaque ::= OCTET STRING
• Counter64 ::= INTEGER (0..18446744073709551615)
Institute of Telecommunications
SMIv2 – struktura definicji MIB
• metka modułu (Module Identity)
• LAST-UPDATED UtcTime
• ORGANIZATION „text”
• CONTACT „text”
• DESCRIPTION „text”
• Revisions
• odwołania do zewnętrznych modułów (IMPORTS)
• definicje typów (Textual Conventions)
• definicje obiektów (Object Type)
• definicje meldunków (Notification Type)
Institute of Telecommunications
RFC 2578 - TEXTUAL-CONVENTION
InstancePointer ::= TEXTUAL-CONVENTIONSTATUS obsolete DESCRIPTION "A pointer to either a specific instance of a MIB object or a conceptual row of a MIB
table in the managed device. In the latter case, by convention, it is the name of the particular instance of the first accessible columnar object in the conceptual row. The two uses of this textual convention are replaced by VariablePointer and RowPointer,
respectively."
SYNTAX OBJECT IDENTIFIER
VariablePointer ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "A pointer to a specific object instance. For example, sysContact.0 or ifInOctets.3."
SYNTAX OBJECT IDENTIFIER
Institute of Telecommunications
OBJECT-TYPE - sysUpTime
sysUpTime OBJECT-TYPESYNTAX Time-TicksACCESS read-onlySTATUS current (dawnej mandatory)DESCRIPTION “Time since the network management portion of the system was last re-initialised.
::= {system 3}
mib-2 (1) [1.3.6.1.2.1]
system (1)
interfaces (2)
at (3)
ip (4)
icmp (5)
tcp (6)
udp (7)
egp (8)
transmission (10)
snmp (11)
1.3.6.1.2.1.1.3
Institute of Telecommunications
OBJECT-TYPE ipNetToMediaTable (1)
ipNetToMediaTable OBJECT-TYPESYNTAX SEQUENCE OF IpNetToMediaEntryACCESS not-accessibleSTATUS current (dawnej mandatory)DESCRIPTION
"The IP Address Translation table used for mapping from
IP addresses to physical addresses."
::= { ip 22 }
mib-2 (1) [1.3.6.1.2.1]
system (1)
interfaces (2)
at (3)
ip (4)
icmp (5)
tcp (6)
udp (7)
egp (8)
transmission (10)
snmp (11)
ipNetToMediaTable (22)
ipNetToMediaEntry (1)
ipNetToMediaIfIndex (1)
ipNetToMediaPhysAddress (2)
ipNetToMediaNetAddress (3)
ipNetToMediaType (4)
Institute of Telecommunications
NOTIFICATION-TYPE
linkUp NOTIFICATION-TYPE
OBJECTS { ifIndex }
STATUS current
DESCRIPTION "A linkUp trap signifies that the SNMPv2 entity,
acting in an agent role, recognizes that one of the communication links represented in its configuration has
come up."
::= { snmpTraps 4 }
internet (1)
1.3.6.
snmpV2(6)
mib-2 (1)
mgmt( 2)
snmpModules (3)
snmpMIB(1)
snmpMIBObjects(1)
snmpTraps(5)
linkUp(4)
1.3.6.1.6.3.1.1.5.4
Institute of Telecommunications
wybrane (z ponad 100) dokumenty RFC
• MPLS
• RFC3031 Multiprotocol Label Switching Architecture January 2001
• RFC3032 MPLS Label Stack Encoding January 2001
• sygnalizacja
• RFC3209 RSVP-TE: Extensions to RSVP for LSP Tunnels December 2001
• RFC5036 LDP Specification L. Andersson October 2012
• RFC3214 LSP Modification Using CR-LDP January 2002
• RFC3107 Carrying Label Information in BGP-4 May 2001
• VPN
• RFC4364 BGP/MPLS IP Virtual Private Networks (VPNs) February 2006
• RFC4365 Applicability Statement for BGP/MPLS IP Virtual PrivateNetworks (VPNs) February 2006
• RFC2917 A Core MPLS IP VPN Architecture September 2000
Institute of Telecommunications
IP forwarding -- FIB longest match
47.1
47.247.3
IP 47.1.1.1
IP 47.1.1.1
IP 47.1.1.1IP 47.1.1.1
prefix out
47.1 1
47.2 2
47.3 3
prefix out
47.1 1
47.2 2
47.3 3
prefix out
47.1 1
47.2 2
47.3 3
1
2
31
2
1
2
3
IP IP IP
3
Institute of Telecommunications
mpls forwarding
47.1
47.247.3
IP 47.1.1.1
2
100
x
IP 47.1.1.1
prefix FEC
47.1 A
47.2 B
FEC
A
B
out
1
1
label
100
200
out
1
2
label
x
400
in
3
3
label
100
200
in
3
label
x
2
1
prefix out
47.1 1
47.2 2
47.3 3
IP IP IP
MPLS MPLS MPLS
1
2
31
2
1
2
3
3
Institute of Telecommunications
etykieta MPLS Ethernet, PPP
• • • pakiet IP
label sexp TTL
label [20] exp [3] - experimental (DSCPs – różne opcje kodowania)s [1] - bottom of the stackTTL [8] - Time To Live
LNL1
ramka warstwy 2
payload
Institute of Telecommunications
P1
P2
P3
tunele MPLS (i)
PE1
PE2
PE3
• router wewnętrzny musi utrzymywać FT entry dla każdego wirtualnego łącza (ścieżki MPLS) - słaba skalowalność
• jak ograniczyć liczbę wierszy?
• umieścić łącza w tunelach
Institute of Telecommunications
tunele MPLS (ii)
CE B2
CE A2
PE A P PE B
CE B1
CE A1
15
6
13
12 1217
1522 2217
Institute of Telecommunications
konfigurowanie LSP via SNMP
2
47.1
47.247.3
NMS
A
(MIB)
NMS
