=?iso-8859-1?q?Vijay=20Anand?= wrote:
>
> hello friends,
>
> by default,EIGRP use 50% of its bandwidth,,i got a dout that
> this 50% is using for data transfer or EIGRP update transfer?
By default, EIGRP will use no more than 50% of the bandwidth of an
interface. This is for EIGRP packets themselves, not for the forwarding of
user data, which EIGRP wouldn't handle anyway. (It's a routing protocol, not
a routed protocol).
I think this must be a legacy feature for using EIGRP on low-bandwidth
links. These days something would really be wrong if EIGRP approached 50% of
the bandwidth on a typical interface.
>
> i guess its for EIGRP update Transfer,isn't it ?
>
> and what is the size of a routing table,if it contain 2 routes?
EIGRP resides on a typical 20-byte IP header. The EIGRP header is 20 bytes
and includes a version, an opcode (to identify type of packet, such as
Update), AS, and a few other things.
Each route is about 26-30 bytes. It depends on the prefix length.
Here's an example of an initial Update packet:
Ethernet Header
Destination: 00:00:0C:02:75:14
Source: 00:60:09:C3:FB:83
Protocol Type: 0x0800 IP
IP Header - Internet Protocol Datagram
Version: 4
Header Length: 5 (20 bytes)
Type of Service: %00000000
000. .... Precedence: Routine,
...0 .... Normal Delay,
.... 0... Normal Throughput,
.... .0.. Normal Reliability
.... ..0. ECT bit - transport protocol will ignore
the CE bit
.... ...0 CE bit - no congestion
Total Length: 150
Identifier: 0
Fragmentation Flags: %000
0.. Reserved
.0. May Fragment
..0 Last Fragment
Fragment Offset: 0 (0 bytes)
Time To Live: 2
Protocol: 88 EIGRP
Header Checksum: 0xE7EC
Source IP Address: 172.16.60.1
Dest. IP Address: 172.16.60.2
No IP Options
EIGRP - Enhanced Interior Gateway Routing Protocol
Version: 2
Opcode: 1 Update
Checksum: 0x3214
Flags: 0x00000001 Initial Update Packet
Sequence Number: 3
Ack Number: 0
Autonomous System #: 100
Parameter Block
Protocol ID: 1 IP
Type Code: 2 IP Internal Routes
Field Length: 26
Next Hop Address: 0.0.0.0
Time Delay: 537600 (10 msec/256)
Path Bandwidth: 1657856 (2,560,000,000 /kbps)
MTU: 1500 (min/max transmission unit)
Hop Count: 1
Reliability: 255 (error percentage)
Load Utilization: 1%
Reserved: 0
Prefix Length: 8 (in bits)
Destination: 10. (prefix)
Parameter Block
Protocol ID: 1 IP
Type Code: 2 IP Internal Routes
Field Length: 28
Next Hop Address: 0.0.0.0
Time Delay: 512000 (10 msec/256)
Path Bandwidth: 1657856 (2,560,000,000 /kbps)
MTU: 1500 (min/max transmission unit)
Hop Count: 0
Reliability: 255 (error percentage)
Load Utilization: 1%
Reserved: 0
Prefix Length: 24 (in bits)
Destination: 172.16.40. (prefix)
Parameter Block
Protocol ID: 1 IP
Type Code: 2 IP Internal Routes
Field Length: 28
Next Hop Address: 0.0.0.0
Time Delay: 1024000 (10 msec/256)
Path Bandwidth: 1657856 (2,560,000,000 /kbps)
MTU: 1500 (min/max transmission unit)
Hop Count: 1
Reliability: 255 (error percentage)
Load Utilization: 1%
Reserved: 0
Prefix Length: 24 (in bits)
Destination: 172.16.20. (prefix)
Parameter Block
Protocol ID: 1 IP
Type Code: 2 IP Internal Routes
Field Length: 28
Next Hop Address: 0.0.0.0
Time Delay: 1049600 (10 msec/256)
Path Bandwidth: 1657856 (2,560,000,000 /kbps)
MTU: 1500 (min/max transmission unit)
Hop Count: 2
Reliability: 255 (error percentage)
Load Utilization: 1%
Reserved: 0
Prefix Length: 24 (in bits)
Destination: 172.16.10. (prefix)
_______________________________
Priscilla Oppenheimer
www.troubleshootingnetworks.com
www.priscilla.com
>
> thanx a lot
>
> VijayAnand C.D, CCNP
>
> Catch all the cricket action. Download Yahoo! Score tracker
>
>
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