Skip to content
GitLab
Projects
Groups
Snippets
/
Help
Help
Support
Community forum
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
Menu
Open sidebar
emulab
emulab-stable
Commits
c8dd525a
Commit
c8dd525a
authored
Apr 05, 2001
by
Mike Hibler
Browse files
add item for clearing sticky ARP entries
parent
11c5f8e1
Changes
1
Hide whitespace changes
Inline
Side-by-side
doc/cisco-voodoo.txt
View file @
c8dd525a
...
...
@@ -95,8 +95,8 @@ ID Name Members of VLAN
2. Checking on the firewall rules
You have to login to the "control" Cisco
, enable
and then
"session 15" to
connect to the Router module.
You have to login to the "control" Cisco and then
"session 15" to
connect to the Router module.
While at the Router> prompt, you will get any "access denied" type
messages that the router produces, ala:
...
...
@@ -110,17 +110,36 @@ ID Name Members of VLAN
To see the whole lists in all their ugliness, type:
show ip access-lists
The rules are pretty straightforward. First match wins. Netmasks are bass-ackwards
(intead of 255.255.255.0, you would use 0.0.0.255). Each list is applied both
on entrance and exit to the like-named control network VLAN.
The rules are pretty straightforward. First match wins. Netmasks are
bass-ackwards (intead of 255.255.255.0, you would use 0.0.0.255).
Each list is applied both on entrance and exit to the like-named control
network VLAN.
3. Changing the firewall rules
ROB: Working on this part
4. Finding MAC address information
To find which port a given MAC address is on type (on the switch console):
show cam <MAC> (where MAC is colon-separated, like 08:00:2b:81:62:d3
To show all MAC addresses in a given VLAN, type:
show cam dynamic <VLAN> (where VLAN is the number, not the name)
To find which port a given MAC address is on type (on the switch console):
show cam <MAC>
where MAC is colon-seperated, like 08:00:2b:81:62:d3.
To show all MAC addresses in a given VLAN, type:
show cam dynamic <VLAN>
where VLAN is the number, not the name.
5. Deleting a "sticky" ARP entry
If you should ever be so unfortunate as to have to replace a faulty
shark, in addition to recording the new MAC address in the DB and DHCP
config file, you may also need to clear it from the router module.
If you fire up a new shark, and it says that it cannot get its DHCP info,
this is likely the problem. To find out, login to the control Cisco and
"session 15" to get to the router module. You should start seeing periodic
24w2d: %IP-3-STCKYARPOVR: Attempt to overwrite Sticky ARP entry: \
155.101.130.73, hw: 0800.2b81.62d3 by hw: 0800.2b81.611b
messages. To clear the arp entry (actually the whole cache), enable at
the Router> prompt and then do "clear arp".
Write
Preview
Supports
Markdown
0%
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment