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Chapter 28 DHCP Relay
IES-1248-51V User’s Guide
218
and optional information about the slot and port on which the DHCP request was
received.
The following table shows the format of the private Agent Circuit ID sub-option.
The (binary) “1” in the first field identifies this as an Agent Circuit ID sub-option.
The length N gives the total number of octets in the Agent Information Field. If
the configuration request was received on a DSL port, a 1-byte Slot No field
specifies the ingress slot number, and a 1-byte Port No field specifies the ingress
port number (both in hexadecimal format). The next field is 2 bytes and displays
the DHCP request packet’s VLAN ID. The last field (A) can range from 1 to 24
bytes (including a one-byte termination character) and is optional information
(that you specify) about this relay agent.
The Agent Information field that the device adds also contains an “Agent Remote-
ID sub-option” of information that you specify.
The following table shows the format of the private Agent Remote ID sub-option.
The “2” in the first field identifies this as an Agent Remote ID sub-option. The
length N gives the total number of octets in the Agent Information Field. Next, the
extra information field (A in the table) contains from 0 to 23 bytes of optional
information (that you specify) with no spaces and no termination character (if you
do not specify any information, this field contains no data). Next, there is a space
and the letters “eth” followed by another space. Then there is the slot number and
port number (in plain text format) upon which the DHCP client request was
received. This is followed by a colon (:), the VLAN ID (VID) number, a period (.)
and the MAC address (in hexadecimal format).
28.2.2 TR-101 Format
The Agent Information field that the IES-1248-51V adds contains an “Agent
Circuit-ID sub-option” that includes the system name or IP address, slot ID, port
number, VPI, and VCI on which the TCP/IP configuration request was received.
The following figure shows the format of the TR-101 Agent Circuit ID sub-option.
The 1 in the first field identifies this as an Agent Circuit ID sub-option. The next
field specifies the length of the field. The hostname field displays the system
name, if it has been configured, the extra information field (A) if the hostname
was not configured, or the IP address in dotted decimal notation (w.x.y.z), if
neither the system name nor the extra information field was been configured. In
either case, the hostname is truncated to 23 characters, and trailing spaces are
Table 57
DHCP Relay Agent Circuit ID Sub-option Format: Private
1
N
Slot No
Port No
VLAN ID
A
Table 58
DHCP Relay Agent Remote ID Sub-option Format: Private
2
N
A
“ eth
“
Slot No.
/ Port No.
: VLAN ID
.
MAC
Summary of Contents for IES-1248-51A
Page 2: ......
Page 8: ...Safety Warnings IES 1248 51V User s Guide 8...
Page 11: ...Contents Overview IES 1248 51V User s Guide 11 Appendices and Index 593...
Page 12: ...Contents Overview IES 1248 51V User s Guide 12...
Page 32: ...Table of Contents IES 1248 51V User s Guide 32...
Page 34: ...34...
Page 46: ...Chapter 1 Introducing the IES 1248 51V IES 1248 51V User s Guide 46...
Page 52: ...Chapter 2 Hardware Installation IES 1248 51V User s Guide 52...
Page 60: ...Chapter 3 Front Panel Connections IES 1248 51V User s Guide 60...
Page 64: ...Chapter 4 MDF Connections IES 1248 51V User s Guide 64...
Page 66: ...Chapter 5 Power Connections IES 1248 51V User s Guide 66...
Page 70: ...70...
Page 88: ...Chapter 8 Tutorials IES 1248 51V User s Guide 88...
Page 96: ...Chapter 9 Home and Port Statistics Screens IES 1248 51V User s Guide 96...
Page 116: ...Chapter 14 IP Setup IES 1248 51V User s Guide 116...
Page 138: ...Chapter 16 xDSL Port Setup IES 1248 51V User s Guide 138...
Page 162: ...162...
Page 186: ...Chapter 20 IGMP IES 1248 51V User s Guide 186...
Page 198: ...Chapter 23 Packet Filtering IES 1248 51V User s Guide 198...
Page 208: ...Chapter 25 Spanning Tree Protocol IES 1248 51V User s Guide 208...
Page 214: ...Chapter 26 Port Authentication IES 1248 51V User s Guide 214...
Page 222: ...Chapter 28 DHCP Relay IES 1248 51V User s Guide 222...
Page 228: ...Chapter 29 DHCP Snoop IES 1248 51V User s Guide 228...
Page 246: ...Chapter 32 DSCP IES 1248 51V User s Guide 246...
Page 258: ...Chapter 34 ACL IES 1248 51V User s Guide 258...
Page 262: ...Chapter 36 Syslog IES 1248 51V User s Guide 262...
Page 272: ...Chapter 37 Access Control IES 1248 51V User s Guide 272...
Page 300: ...Chapter 40 Maximum MTU Size IES 1248 51V User s Guide 300...
Page 306: ...306...
Page 354: ...Chapter 47 Diagnostic IES 1248 51V User s Guide 354...
Page 358: ...Chapter 48 MAC Table IES 1248 51V User s Guide 358...
Page 362: ...362...
Page 376: ...Chapter 51 Common Commands IES 1248 51V User s Guide 376...
Page 392: ...Chapter 53 Alarm Commands IES 1248 51V User s Guide 392...
Page 404: ...Chapter 54 DHCP Commands IES 1248 51V User s Guide 404...
Page 408: ...Chapter 55 OUI Filter IES 1248 51V User s Guide 408...
Page 418: ...Chapter 56 IEEE 802 1Q Tagged VLAN and Isolation Commands IES 1248 51V User s Guide 418...
Page 423: ...Chapter 57 MAC Commands IES 1248 51V User s Guide 423...
Page 424: ...Chapter 57 MAC Commands IES 1248 51V User s Guide 424...
Page 436: ...Chapter 58 IGMP Commands IES 1248 51V User s Guide 436...
Page 440: ...Chapter 59 Packet Filter Commands IES 1248 51V User s Guide 440...
Page 446: ...Chapter 60 Switch and Statistics Commands IES 1248 51V User s Guide 446...
Page 510: ...Chapter 64 ADSL Commands IES 1248 51V User s Guide 510...
Page 514: ...Chapter 65 G Bond IES 1248 51V User s Guide 514...
Page 540: ...Chapter 67 ACL Commands IES 1248 51V User s Guide 540...
Page 555: ...Chapter 68 VoIP Commands IES 1248 51V User s Guide 555...
Page 578: ...Chapter 70 Troubleshooting IES 1248 51V User s Guide 578...
Page 593: ...593 PART VI Appendices and Index Changing a Fuse 595 Index 645...
Page 594: ...594...
Page 596: ...Appendix A Changing a Fuse IES 1248 51V User s Guide 596...
Page 644: ...Appendix B PSTN Parameters by Country IES 1248 51V User s Guide 644...