Understanding Linux Network Internals 2005 phần 4 docx
Understanding Linux Network Internals 2005 phần 4 docx
... which can assume 4, 096
different values, allows a network device, for example, to have up to 4, 096 different bridge IDs sharing a single MAC
address. Before, this would have required 4, 096 different ... now only 4 bits in size. For backward compatibility, the bridge priority range is still 0- 64 K, but since you
have only four bits to play with, you now have priorities in incremen...
Understanding Linux Network Internals 2005 phần 1 pps
... 14. Bridging: Concepts
Section 14. 1. Repeaters, Bridges, and Routers
Section 14. 2. Bridges Versus Switches
Section 14. 3. Hosts
Section 14. 4. Merging LANs with Bridges
Section 14. 5. ... Version 4 (IPv4)
Chapter 18. Internet Protocol Version 4 (IPv4): Concepts
Section 18.1. IP Protocol: The Big Picture
Section 18.2. IP Header
Section 18.3. IP Options
Secti...
Understanding Linux Network Internals 2005 phần 2 pdf
... are examples of the model in Figure
5 -4( b). The model in Figure 5 -4( a) can be seen as a special case of the other two.
5.9.2. Interaction with the Kernel Network Stack
Virtual devices and real ... "Memory Optimizations."
7.1 .4. Use of Boot Options to Configure Network Devices
In light of what we saw in the previous sections, let's see how the networking code uses bo...
Understanding Linux Network Internals 2005 phần 3 pptx
... values shown in Figure 9 -4. As avg_blog hits one of the thresholds
shown in the figure, cng_level changes value. The definitions of the NET_RX_XXX enum values are in include /linux/ netdevice.h, and ... register it. Thanks.
Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com
10 .4. 4. Old Versus New Driver Interfaces
Now that the meaning of the NAPI-related fields of th...
Understanding Linux Network Internals 2005 phần 5 pdf
... multiple of 4 bytes (the size of an IP
address).
[*]
[*]
(40 -3) /4= 9, where 40 is the maximum size of the IP options, 3 is the size of the options header, and 4 is the size of
an IPv4 address.
[*]
... values (ipv4_devconf_dflt). The
meanings of its fields are covered in Chapters 28 and 36.
ipv4_config structure
While ipv4_devconf structures are used to store per-device configurati...
Understanding Linux Network Internals 2005 phần 6 ppt
... (208.201.239.36) 56( 84) bytes of data
64 bytes from www.oreillynet.com (208.201.239.36): icmp_seq=0 ttl=50 time= 245 ms
64 bytes from www.oreillynet.com (208.201.239.36): icmp_seq=1 ttl=50 time= 244 ms
For ... configuration
Performance
Transition from IPv4 networks to IPv6 networks
Security
Naturally, the committees designing the new protocol have tried to keep IPv4 and IPv6 as compati...
Understanding Linux Network Internals 2005 phần 7 pot
... confirmation from the L4 layer and the setting of the state to
NUD_REACHABLE does not affect traffic in any way.
Note that the correlation between the two packets in Figure 26- 14 could not be performed ... have any knowledge of data streams. This is why the L4 layer takes care of the confirmation. TCP SYN/ACK exchanges
are only one example of an L4 protocol providing external confirmation...
Understanding Linux Network Internals 2005 phần 8 ppsx
...
28.
Table 29 -4. Kernel variables and associated files in /proc/sys/net/ipv4/conf subdirectories
Kernel variable nameFilenameDefault value for IPv4/IPv6
ipv4_devconf.arp_announce
arp_announce
0
ipv4_devconf.arp_filter
arp_filter
0
ipv4_devconf.arp_ignore
arp_ignore
0
ipv4_devconf.medium_id
medium_id
0
ipv4_devconf.proxy_arp
proxy_arp
0
As ... NET_XXX values in include /linux/ sysctl.h. ARP,...
Understanding Linux Network Internals 2005 phần 9 ppsx
... configured subnets. For example, the command arp -s 10.0.0.1 11:22:33 :44 :55:66 adds the mapping of 10.0.0.1 to
11:22:33 :44 :55:66 to the ARP cache. This command would be rejected by the kernel ... Notifications" in Chapter 32).
34. 3.1. Adding a Route
The insertion of a new route is taken care of by fn_hash_insert, whose logic is described in Figures 34- 3(a) and 34- 3(b).
[*]
This...
Understanding Linux Network Internals 2005 phần 10 pdf
... subjects.
Philip Dangler was the production editor, and Audrey Doyle was the copyeditor for Understanding Linux Network Internals. Sada Preisch
proofread the book. Mary Brady and Colleen Gorman provided ... http://www.simpopdf.com
ICMP, list of
IPv4, list of
L4 protocols, list of
neighboring subsystem, list of
network device initialization, list of
networking, list of
notific...
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