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DescriptionAntoni Segura Puimedon
2013-12-13 12:22:06 UTC
+++ This bug was initially created as a clone of Bug #1042799 +++
Description of problem:
In the output of "ip -d -o link show" and "ip -d -o monitor link" vlan and
macvlan devices are reported with the following form:
"device name" + "@" + "device name of the underlying device".
Since it is perfectly legal for another device to include symbols in their
names, e.g., "@", it is perfectly possible to have a dummy device called:
p1p3.13@p1p3
and a vlan device called p1p3.13 that is being reported as
p1p3.13@p1p3
In the output of "ip -d -o link show" this is disambiguable thanks to the fact
that dummies, vlans and macvlans have their type shown in the final segment:
21: p1p3.13@p1p3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN \ link/ether 00:10:18:e1:6c:f4 brd ff:ff:ff:ff:ff:ff\ vlan id 13 <REORDER_HDR>
23: p1p3.13@p1p3: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN \ link/ether 82:17:ed:f9:e8:f3 brd ff:ff:ff:ff:ff:ff\ dummy
However, the output of "ip -d -o monitor link" doesn't include the type
information for any device (not even for just vlanned and dummy types like
"ip -d -o link show" does). E.g.:
23: p1p3.13@p1p3: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN \ link/ether c2:01:5c:db:bd:39 brd ff:ff:ff:ff:ff:ff
21: p1p3.13@p1p3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN \ link/ether 00:10:18:e1:6c:f4 brd ff:ff:ff:ff:ff:ff
Without a priori knowledge (having executed before a detailed link show and
keeping a database by interface index) there is no way to tell that the former
is a dummy and the latter is the vlan.
Version-Release number of selected component (if applicable): all
How reproducible: 100%
Steps to Reproduce:
1. start the monitor "ip -d -o monitor link"
2. Create vlan 13 over a nic (for example named p1p3)
3. Create a dummy called "p1p3.13@p1p3"
4. Check the detailed link monitor output
Actual results:
23: p1p3.13@p1p3: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN \ link/ether c2:01:5c:db:bd:39 brd ff:ff:ff:ff:ff:ff
21: p1p3.13@p1p3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN \ link/ether 00:10:18:e1:6c:f4 brd ff:ff:ff:ff:ff:ff
Expected results:
23: p1p3.13@p1p3: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN \ link/ether c2:01:5c:db:bd:39 brd ff:ff:ff:ff:ff:ff\ dummy
21: p1p3.13@p1p3: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state LOWERLAYERDOWN \ link/ether 00:10:18:e1:6c:f4 brd ff:ff:ff:ff:ff:ff\ vlan id 13 <REORDER_HDR>
Comment 3Pavel Šimerda (pavlix)
2014-10-10 19:56:34 UTC
Reproduced it with upstream git:
Terminal #1:
# ip monitor
Terminal #2:
# ip link add d1 type dummy
# ip link add link d1 v1 type vlan id 13
Output (terminal #1):
13: d1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default
link/ether 9a:ca:f9:40:76:13 brd ff:ff:ff:ff:ff:ff
13: d1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default
link/ether 9a:ca:f9:40:76:13 brd ff:ff:ff:ff:ff:ff
14: v1@d1: <BROADCAST,NOARP,M-DOWN> mtu 1500 qdisc noop state DOWN group default
link/ether 9a:ca:f9:40:76:13 brd ff:ff:ff:ff:ff:ff
Additional info:
Neither "-d" nor "-o" seem to be documented in the manual pages.
Comment 5Pavel Šimerda (pavlix)
2015-06-04 12:04:53 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2015-2117.html