Data Center Notes

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/VMDC/2-6/vmdcm1f1wp.html

http://dustydev.blogspot.com/2013/03/data-center-design-constraints.html

http://dustydev.blogspot.fr/2013/08/cisco-nexus-7000-proxy-routing.html

DHCP Options

This post and the next one with ICMP types I am using as a usefull notes and I only share this to have quick access to RFC links.

Source info => IANA

DHCP OPTION FIELD :

Tag	Name	Desription	RFC
0	Pad	None	[RFC2132]
1	Subnet Mask	Subnet Mask Value	[RFC2132]
2	Time Offset	Time Offset in Seconds from UTC (note: deprecated by 100 and 101)	[RFC2132]
3	Router	N/4 Router addresses	[RFC2132]
4	Time Server	N/4 Timeserver addresses	[RFC2132]
5	Name Server	N/4 IEN-116 Server addresses	[RFC2132]
6	Domain Server	N/4 DNS Server addresses	[RFC2132]
7	Log Server	N/4 Logging Server addresses	[RFC2132]
8	Quotes Server	N/4 Quotes Server addresses	[RFC2132]
9	LPR Server	N/4 Printer Server addresses	[RFC2132]
10	Impress Server	N/4 Impress Server addresses	[RFC2132]
11	RLP Server	N/4 RLP Server addresses	[RFC2132]
12	Hostname	Hostname string	[RFC2132]
13	Boot File Size	Size of boot file in 512 byte chunks	[RFC2132]
14	Merit Dump File	Client to dump and name the file to dump it to	[RFC2132]
15	Domain Name	The DNS domain name of the client	[RFC2132]
16	Swap Server	Swap Server address	[RFC2132]
17	Root Path	Path name for root disk	[RFC2132]
18	Extension File	Path name for more BOOTP info	[RFC2132]
19	Forward On/Off	Enable/Disable IP Forwarding	[RFC2132]
20	SrcRte On/Off	Enable/Disable Source Routing	[RFC2132]
21	Policy Filter	Routing Policy Filters	[RFC2132]
22	Max DG Assembly	Max Datagram Reassembly Size	[RFC2132]
23	Default IP TTL	Default IP Time to Live	[RFC2132]
24	MTU Timeout	Path MTU Aging Timeout	[RFC2132]
25	MTU Plateau	Path MTU Plateau Table	[RFC2132]
26	MTU Interface	Interface MTU Size	[RFC2132]
27	MTU Subnet	All Subnets are Local	[RFC2132]
28	Broadcast Address	Broadcast Address	[RFC2132]
29	Mask Discovery	Perform Mask Discovery	[RFC2132]
30	Mask Supplier	Provide Mask to Others	[RFC2132]
31	Router Discovery	Perform Router Discovery	[RFC2132]
32	Router Request	Router Solicitation Address	[RFC2132]
33	Static Route	Static Routing Table	[RFC2132]
34	Trailers	Trailer Encapsulation	[RFC2132]
35	ARP Timeout	ARP Cache Timeout	[RFC2132]
36	Ethernet	Ethernet Encapsulation	[RFC2132]
37	Default TCP TTL	Default TCP Time to Live	[RFC2132]
38	Keepalive Time	TCP Keepalive Interval	[RFC2132]
39	Keepalive Data	TCP Keepalive Garbage	[RFC2132]
40	NIS Domain	NIS Domain Name	[RFC2132]
41	NIS Servers	NIS Server Addresses	[RFC2132]
42	NTP Servers	NTP Server Addresses	[RFC2132]
43	Vendor Specific	Vendor Specific Information	[RFC2132]
44	NETBIOS Name Srv	NETBIOS Name Servers	[RFC2132]
45	NETBIOS Dist Srv	NETBIOS Datagram Distribution	[RFC2132]
46	NETBIOS Node Type	NETBIOS Node Type	[RFC2132]
47	NETBIOS Scope	NETBIOS Scope	[RFC2132]
48	X Window Font	X Window Font Server	[RFC2132]
49	X Window Manager	X Window Display Manager	[RFC2132]
50	Address Request	Requested IP Address	[RFC2132]
51	Address Time	IP Address Lease Time	[RFC2132]
52	Overload	Overload "sname" or "file"	[RFC2132]
53	DHCP Msg Type	DHCP Message Type	[RFC2132]
54	DHCP Server Id	DHCP Server Identification	[RFC2132]
55	Parameter List	Parameter Request List	[RFC2132]
56	DHCP Message	DHCP Error Message	[RFC2132]
57	DHCP Max Msg Size	DHCP Maximum Message Size	[RFC2132]
58	Renewal Time	DHCP Renewal (T1) Time	[RFC2132]
59	Rebinding Time	DHCP Rebinding (T2) Time	[RFC2132]
60	Class Id	Class Identifier	[RFC2132]
61	Client Id	Client Identifier	[RFC2132]
62	NetWare/IP Domain	NetWare/IP Domain Name	[RFC2242]
63	NetWare/IP Option	NetWare/IP sub Options	[RFC2242]
64	NIS-Domain-Name	NIS+ v3 Client Domain Name	[RFC2132]
65	NIS-Server-Addr	NIS+ v3 Server Addresses	[RFC2132]
66	Server-Name	TFTP Server Name	[RFC2132]
67	Bootfile-Name	Boot File Name	[RFC2132]
68	Home-Agent-Addrs	Home Agent Addresses	[RFC2132]
69	SMTP-Server	Simple Mail Server Addresses	[RFC2132]
70	POP3-Server	Post Office Server Addresses	[RFC2132]
71	NNTP-Server	Network News Server Addresses	[RFC2132]
72	WWW-Server	WWW Server Addresses	[RFC2132]
73	Finger-Server	Finger Server Addresses	[RFC2132]
74	IRC-Server	Chat Server Addresses	[RFC2132]
75	StreetTalk-Server	StreetTalk Server Addresses	[RFC2132]
76	STDA-Server	ST Directory Assist. Addresses	[RFC2132]
77	User-Class	User Class Information	[RFC3004]
78	Directory Agent	directory agent information	[RFC2610]
79	Service Scope	service location agent scope	[RFC2610]
80	Rapid Commit	Rapid Commit	[RFC4039]
81	Client FQDN	Fully Qualified Domain Name	[RFC4702]
82	Relay Agent Information	Relay Agent Information	[RFC3046]
83	iSNS	Internet Storage Name Service	[RFC4174]
84	REMOVED/Unassigned		[RFC3679]
85	NDS Servers	Novell Directory Services	[RFC2241]
86	NDS Tree Name	Novell Directory Services	[RFC2241]
87	NDS Context	Novell Directory Services	[RFC2241]
88	BCMCS Controller Domain Name list		[RFC4280]
89	BCMCS Controller IPv4 address option		[RFC4280]
90	Authentication	Authentication	[RFC3118]
91	client-last-transaction-time option		[RFC4388]
92	associated-ip option		[RFC4388]
93	Client System	Client System Architecture	[RFC4578]
94	Client NDI	Client Network Device Interface	[RFC4578]
95	LDAP	Lightweight Directory Access Protocol	[RFC3679]
96	REMOVED/Unassigned		[RFC3679]
97	UUID/GUID	UUID/GUID-based Client Identifier	[RFC4578]
98	User-Auth	Open Group's User Authentication	[RFC2485]
99	GEOCONF_CIVIC		[RFC4776]
100	PCode	IEEE 1003.1 TZ String	[RFC4833]
101	TCode	Reference to the TZ Database	[RFC4833]
102-107	REMOVED/Unassigned		[RFC3679]
108	REMOVED/Unassigned		[RFC3679]
109	Unassigned		[RFC3679]
110	REMOVED/Unassigned		[RFC3679]
111	Unassigned		[RFC3679]
112	Netinfo Address	NetInfo Parent Server Address	[RFC3679]
113	Netinfo Tag	NetInfo Parent Server Tag	[RFC3679]
114	URL	URL	[RFC3679]
115	REMOVED/Unassigned		[RFC3679]
116	Auto-Config	DHCP Auto-Configuration	[RFC2563]
117	Name Service Search	Name Service Search	[RFC2937]
118	Subnet Selection Option	Subnet Selection Option	[RFC3011]
119	Domain Search	DNS domain search list	[RFC3397]
120	SIP Servers DHCP Option	SIP Servers DHCP Option	[RFC3361]
121	Classless Static Route Option	Classless Static Route Option	[RFC3442]
122	CCC	CableLabs Client Configuration	[RFC3495]
123	GeoConf Option	GeoConf Option	[RFC6225]
124	V-I Vendor Class	Vendor-Identifying Vendor Class	[RFC3925]
125	V-I Vendor-Specific Information	Vendor-Identifying Vendor-Specific Information	[RFC3925]
126	Removed/Unassigned		[RFC3679]
127	Removed/Unassigned		[RFC3679]
128	PXE - undefined (vendor specific)		[RFC4578]
128	Etherboot signature. 6 bytes: E4:45:74:68:00:00
128	DOCSIS "full security" server IP address
128	TFTP Server IP address (for IP Phone software load)
129	PXE - undefined (vendor specific)		[RFC4578]
129	Kernel options. Variable length string
129	Call Server IP address
130	PXE - undefined (vendor specific)		[RFC4578]
130	Ethernet interface. Variable length string.
130	Discrimination string (to identify vendor)
131	PXE - undefined (vendor specific)		[RFC4578]
131	Remote statistics server IP address
132	PXE - undefined (vendor specific)		[RFC4578]
132	IEEE 802.1Q VLAN ID
133	PXE - undefined (vendor specific)		[RFC4578]
133	IEEE 802.1D/p Layer 2 Priority
134	PXE - undefined (vendor specific)		[RFC4578]
134	Diffserv Code Point (DSCP) for VoIP signalling and media streams
135	PXE - undefined (vendor specific)		[RFC4578]
135	HTTP Proxy for phone-specific applications
136	OPTION_PANA_AGENT		[RFC5192]
137	OPTION_V4_LOST		[RFC5223]
138	OPTION_CAPWAP_AC_V4	CAPWAP Access Controller addresses	[RFC5417]
139	OPTION-IPv4_Address-MoS	a series of suboptions	[RFC5678]
140	OPTION-IPv4_FQDN-MoS	a series of suboptions	[RFC5678]
141	SIP UA Configuration Service Domains	List of domain names to search for SIP User Agent Configuration	[RFC6011]
142	OPTION-IPv4_Address-ANDSF	ANDSF IPv4 Address Option for DHCPv4	[RFC6153]
143	Unassigned
144	GeoLoc	Geospatial Location with Uncertainty	[RFC6225]
145	FORCERENEW_NONCE_CAPABLE	Forcerenew Nonce Capable	[RFC6704]
146	RDNSS Selection	Information for selecting RDNSS	[RFC6731]
147-149	Unassigned		[RFC3942]
150	TFTP server address		[RFC5859]
150	Etherboot
150	GRUB configuration path name
151	status-code	Status code and optional N byte text message describing status.	[RFC6926]
152	base-time	Absolute time (seconds since Jan 1, 1970) message was sent.	[RFC6926]
153	start-time-of-state	Number of seconds in the past when client entered current state.	[RFC6926]
154	query-start-time	Absolute time (seconds since Jan 1, 1970) for beginning of query.	[RFC6926]
155	query-end-time	Absolute time (seconds since Jan 1, 1970) for end of query.	[RFC6926]
156	dhcp-state	State of IP address.	[RFC6926]
157	data-source	Indicates information came from local or remote server.	[RFC6926]
158	OPTION_V4_PCP_SERVER	Includes one or multiple lists of PCP server IP addresses; each list is treated as a separate PCP server.	[RFC7291]
159	OPTION_V4_PORTPARAMS	This option is used to configure a set of ports bound to a shared IPv4 address.	[RFC7618]
160	DHCP Captive-Portal	DHCP Captive-Portal	[RFC7710]
161-174	Unassigned		[RFC3942]
175	Etherboot (Tentatively Assigned - 2005-06-23)
176	IP Telephone (Tentatively Assigned - 2005-06-23)
177	Etherboot (Tentatively Assigned - 2005-06-23)
177	PacketCable and CableHome (replaced by 122)
178-207	Unassigned		[RFC3942]
208	PXELINUX Magic	magic string = F1:00:74:7E	[RFC5071][Deprecated]
209	Configuration File	Configuration file	[RFC5071]
210	Path Prefix	Path Prefix Option	[RFC5071]
211	Reboot Time	Reboot Time	[RFC5071]
212	OPTION_6RD	OPTION_6RD with N/4 6rd BR addresses	[RFC5969]
213	OPTION_V4_ACCESS_DOMAIN	Access Network Domain Name	[RFC5986]
214-219	Unassigned
220	Subnet Allocation Option	Subnet Allocation Option	[RFC6656]
221	Virtual Subnet Selection (VSS) Option		[RFC6607]
222-223	Unassigned		[RFC3942]
224-254	Reserved (Private Use)
255	End	None	[RFC2132]

ICMP Type

ICMP Type Numbers

According to WIKIPEDA ICMP The Internet Control Message Protocol is part of the Internet Protocol Suite, as defined in RFC 792. ICMP messages are typically used for diagnostic or control purposes or generated in response to errors in IP operations (as specified in RFC 1122). ICMP errors are directed to the source IP address of the originating packet.

The Internet Control Message Protocol (ICMP) is one of the main protocols of the internet protocol suite. It is used by network devices, like routers, to send error messages indicating, for example, that a requested service is not available or that a host or router could not be reached. ICMP can also be used to relay query messages.^[1] It is assigned protocol number 1.^[2] ICMP^[3] differs from transport protocols such as TCP and UDP in that it is not typically used to exchange data between systems, nor is it regularly employed by end-user network applications (with the exception of some diagnostic tools like ping and traceroute). 

 

 

ICMP Header

 

Description of ICMP types : 

Code	Descriton	RFC
0	Net Unreachable	[RFC792]
1	Host Unreachable	[RFC792]
2	Protocol Unreachable	[RFC792]
3	Port Unreachable	[RFC792]
4	Fragmentation Needed and Don't Fragment was Set	[RFC792]
5	Source Route Failed	[RFC792]
6	Destination Network Unknown	[RFC1122]
7	Destination Host Unknown	[RFC1122]
8	Source Host Isolated	[RFC1122]
9	Communication with Destination Network is Administratively Prohibited	[RFC1122]
10	Communication with Destination Host is Administratively Prohibited	[RFC1122]
11	Destination Network Unreachable for Type of Service	[RFC1122]
12	Destination Host Unreachable for Type of Service	[RFC1122]
13	Communication Administratively Prohibited	[RFC1812]
14	Host Precedence Violation	[RFC1812]
15	Precedence cutoff in effect	[RFC1812]